487681557 has 16 divisors (see below), whose sum is σ = 712727040. Its totient is φ = 294159600.

The previous prime is 487681547. The next prime is 487681561. The reversal of 487681557 is 755186784.

It is a happy number.

It is not a de Polignac number, because 487681557 - 2¹⁰ = 487680533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (487681507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28057 + ... + 41982.

It is an arithmetic number, because the mean of its divisors is an integer number (44545440).

Almost surely, 2^487681557 is an apocalyptic number.

It is an amenable number.

487681557 is a deficient number, since it is larger than the sum of its proper divisors (225045483).

487681557 is a wasteful number, since it uses less digits than its factorization.

487681557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70264.

The product of its digits is 1881600, while the sum is 51.

The square root of 487681557 is about 22083.5132395188. The cubic root of 487681557 is about 787.1281493611.

The spelling of 487681557 in words is "four hundred eighty-seven million, six hundred eighty-one thousand, five hundred fifty-seven".