687722052 has 24 divisors (see below), whose sum is σ = 1630992832. Its totient is φ = 225482400.

The previous prime is 687722041. The next prime is 687722089. The reversal of 687722052 is 250227786.

It is a self number, because there is not a number n which added to its sum of digits gives 687722052.

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, 469024 + ... + 470487.

Almost surely, 2^687722052 is an apocalyptic number.

It is an amenable number.

687722052 is an abundant number, since it is smaller than the sum of its proper divisors (943270780).

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

687722052 is a wasteful number, since it uses less digits than its factorization.

687722052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939579 (or 939577 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 39.

The square root of 687722052 is about 26224.4552278975. The cubic root of 687722052 is about 882.6820943195.

The spelling of 687722052 in words is "six hundred eighty-seven million, seven hundred twenty-two thousand, fifty-two".