687907984 has 45 divisors (see below), whose sum is σ = 1366366323. Its totient is φ = 335508576.

The previous prime is 687907931. The next prime is 687907991. The reversal of 687907984 is 489709786.

It is a happy number.

The square root of 687907984 is 26228.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 8288007 + ... + 8288089.

Almost surely, 2^687907984 is an apocalyptic number.

687907984 is the 26228-th square number.

It is an amenable number.

687907984 is a deficient number, since it is larger than the sum of its proper divisors (678458339).

687907984 is an frugal number, since it uses more digits than its factorization.

687907984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332 (or 164 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 58.

The cubic root of 687907984 is about 882.7616342337.

The spelling of 687907984 in words is "six hundred eighty-seven million, nine hundred seven thousand, nine hundred eighty-four".