687885972 has 24 divisors (see below), whose sum is σ = 1610236992. Its totient is φ = 228556800.

The previous prime is 687885949. The next prime is 687886009. The reversal of 687885972 is 279588786.

It is a super-2 number, since 2×687885972² = 946374220948769568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88429 + ... + 95892.

It is an arithmetic number, because the mean of its divisors is an integer number (67093208).

Almost surely, 2^687885972 is an apocalyptic number.

It is an amenable number.

687885972 is an abundant number, since it is smaller than the sum of its proper divisors (922351020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

687885972 is a wasteful number, since it uses less digits than its factorization.

687885972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184639 (or 184637 counting only the distinct ones).

The product of its digits is 13547520, while the sum is 60.

The square root of 687885972 is about 26227.5803687645. The cubic root of 687885972 is about 882.7522184606.

The spelling of 687885972 in words is "six hundred eighty-seven million, eight hundred eighty-five thousand, nine hundred seventy-two".