687044752 has 20 divisors (see below), whose sum is σ = 1340730160. Its totient is φ = 341049888.

The previous prime is 687044747. The next prime is 687044773. The reversal of 687044752 is 257440786.

It is a junction number, because it is equal to n+sod(n) for n = 687044699 and 687044708.

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, 152238 + ... + 156685.

It is an arithmetic number, because the mean of its divisors is an integer number (67036508).

Almost surely, 2^687044752 is an apocalyptic number.

It is an amenable number.

687044752 is a deficient number, since it is larger than the sum of its proper divisors (653685408).

687044752 is a wasteful number, since it uses less digits than its factorization.

687044752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309070 (or 309064 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 43.

The square root of 687044752 is about 26211.5385279079. The cubic root of 687044752 is about 882.3922306318.

The spelling of 687044752 in words is "six hundred eighty-seven million, forty-four thousand, seven hundred fifty-two".