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<S>                                                                    <C>
 
PROSPECTUS SUPPLEMENT                                                     FILE NO. 333-44173
(TO PROSPECTUS DATED JANUARY 29, 1998 AND PROSPECTUS SUPPLEMENT DATED         RULE 424(B)(3)
MARCH 12, 1998)
PROSPECTUS NUMBER: 1706
 
 
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                           MERRILL LYNCH & CO., INC.
                          MEDIUM-TERM NOTES, SERIES B
                   DUE NINE MONTHS OR MORE FROM DATE OF ISSUE
                              FLOATING RATE NOTES
 
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<S>                     <C>                 <C>                                  <C>
 
PRINCIPAL AMOUNT:       $100,000,000             ORIGINAL ISSUE DATE:            May 11, 1998
 
 
CUSIP NUMBER:           59018S G65               STATED MATURITY DATE:           May 11, 1999
 
 
INTEREST CALCULATION:                            DAY COUNT CONVENTION:
/x/ REGULAR FLOATING RATE NOTE                   / / ACTUAL/360
/ / INVERSE FLOATING RATE NOTE                   / / 30/360
(FIXED INTEREST RATE):                           /x/ ACTUAL/ACTUAL
 
 
INTEREST RATE BASIS:
/ / LIBOR                                        / / COMMERCIAL PAPER RATE
/ / CMT RATE                                     / / ELEVENTH DISTRICT COST OF FUNDS RATE
/ / PRIME RATE                                   / / CD RATE
/ / FEDERAL FUNDS RATE                           / / OTHER (SEE ATTACHED)
/x/ TREASURY RATE
DESIGNATED CMT PAGE:                             DESIGNATED LIBOR PAGE:
CMT TELERATE PAGE:                               LIBOR TELERATE PAGE:
CMT REUTERS PAGE:                                LIBOR REUTERS PAGE:
 
 
INDEX MATURITY:         Six Months               MINIMUM INTEREST RATE:          Not Applicable
 
 
SPREAD:                 0.450%                   MAXIMUM INTEREST RATE:          Not Applicable
 
 
INITIAL INTEREST RATE:  5.768%                   SPREAD MULTIPLIER:              Not Applicable
 
 
INTEREST RESET DATES:   Weekly
 
 
INTEREST PAYMENT DATES: Semi-annually on November 15, 1998 and the maturity date, subject to modified
                        following business day convention.
 
 
REPAYMENT AT THE
OPTION OF THE HOLDER:   The Notes cannot be repaid prior to the Stated Maturity Date.
 
 
REDEMPTION AT THE
OPTION OF THE COMPANY:  The Notes cannot be redeemed prior to the Stated Maturity Date.
 
 
FORM:                   The Notes are being issued in fully registered book-entry form.
 
 
TRUSTEE:                The Chase Manhattan Bank
 
 
DATED:                  May 6, 1998
 
 
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