688358872 has 16 divisors (see below), whose sum is σ = 1291725000. Its totient is φ = 343898880.

The previous prime is 688358773. The next prime is 688358873. The reversal of 688358872 is 278853886.

It is a happy number.

It is a super-2 number, since 2×688358872² = 947675873322224768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688358873) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 24454 + ... + 44437.

Almost surely, 2^688358872 is an apocalyptic number.

It is an amenable number.

688358872 is a deficient number, since it is larger than the sum of its proper divisors (603366128).

688358872 is a wasteful number, since it uses less digits than its factorization.

688358872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70146 (or 70142 counting only the distinct ones).

The product of its digits is 5160960, while the sum is 55.

The square root of 688358872 is about 26236.5941387216. The cubic root of 688358872 is about 882.9544602640.

The spelling of 688358872 in words is "six hundred eighty-eight million, three hundred fifty-eight thousand, eight hundred seventy-two".