FILE NO. 333-44173 RULE 424(B)(3) PROSPECTUS SUPPLEMENT (TO THE PROSPECTUS DATED JANUARY 29, 1998 AND PROSPECTUS SUPPLEMENT DATED MARCH 12, 1998) PROSPECTUS NUMBER: 1727 MERRILL LYNCH & CO., INC. MEDIUM-TERM NOTES, SERIES B DUE NINE MONTHS OR MORE FROM DATE OF ISSUE FIXED RATE NOTES
PRINCIPAL AMOUNT: $15,000,000 CUSIP NUMBER: 59018S K37 INTEREST RATE: 6.37000% ORIGINAL ISSUE DATE: June 11, 1998 STATED MATURITY DATE: June 11, 2010 INTEREST PAYMENT DATES: Each May 15th and November 15th, commencing on November 16, 1998 through May 15, 2010 and on the Stated Maturity Date, subject to 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: June 8, 1998