687388752 has 30 divisors (see below), whose sum is σ = 1923734202. Its totient is φ = 229129536.

The previous prime is 687388697. The next prime is 687388789. The reversal of 687388752 is 257883786.

It can be written as a sum of positive squares in only one way, i.e., 639280656 + 48108096 = 25284^2 + 6936^2 .

It is a super-2 number, since 2×687388752² = 945006592752235008, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2386623 + ... + 2386910.

Almost surely, 2^687388752 is an apocalyptic number.

It is an amenable number.

687388752 is an abundant number, since it is smaller than the sum of its proper divisors (1236345450).

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

687388752 is a wasteful number, since it uses less digits than its factorization.

687388752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4773547 (or 4773538 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 54.

The square root of 687388752 is about 26218.0997023049. The cubic root of 687388752 is about 882.5394759070.

The spelling of 687388752 in words is "six hundred eighty-seven million, three hundred eighty-eight thousand, seven hundred fifty-two".