688431276 has 36 divisors (see below), whose sum is σ = 1874064192. Its totient is φ = 211824864.

The previous prime is 688431241. The next prime is 688431283. The reversal of 688431276 is 672134886.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 735036 + ... + 735971.

Almost surely, 2^688431276 is an apocalyptic number.

It is an amenable number.

688431276 is an abundant number, since it is smaller than the sum of its proper divisors (1185632916).

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

688431276 is a wasteful number, since it uses less digits than its factorization.

688431276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1471030 (or 1471025 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 688431276 is about 26237.9739309269. The cubic root of 688431276 is about 882.9854165941.

The spelling of 688431276 in words is "six hundred eighty-eight million, four hundred thirty-one thousand, two hundred seventy-six".