687480392 has 16 divisors (see below), whose sum is σ = 1297238460. Its totient is φ = 341550144.

The previous prime is 687480379. The next prime is 687480407. The reversal of 687480392 is 293084786.

It can be written as a sum of positive squares in 2 ways, for example, as 675688036 + 11792356 = 25994^2 + 3434^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272423 + ... + 274934.

Almost surely, 2^687480392 is an apocalyptic number.

It is an amenable number.

687480392 is a deficient number, since it is larger than the sum of its proper divisors (609758068).

687480392 is a wasteful number, since it uses less digits than its factorization.

687480392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547520 (or 547516 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 47.

The square root of 687480392 is about 26219.8472916987. The cubic root of 687480392 is about 882.5786930766.

The spelling of 687480392 in words is "six hundred eighty-seven million, four hundred eighty thousand, three hundred ninety-two".