688610872 has 16 divisors (see below), whose sum is σ = 1291665240. Its totient is φ = 344166816.

The previous prime is 688610851. The next prime is 688610873. The reversal of 688610872 is 278016886.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688610873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5563 + ... + 37525.

Almost surely, 2^688610872 is an apocalyptic number.

It is an amenable number.

688610872 is a deficient number, since it is larger than the sum of its proper divisors (603054368).

688610872 is a wasteful number, since it uses less digits than its factorization.

688610872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34662 (or 34658 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 46.

The square root of 688610872 is about 26241.3961518819. The cubic root of 688610872 is about 883.0621934957.

The spelling of 688610872 in words is "six hundred eighty-eight million, six hundred ten thousand, eight hundred seventy-two".