688676136 has 32 divisors (see below), whose sum is σ = 1722409440. Its totient is φ = 229462848.

The previous prime is 688676123. The next prime is 688676159. The reversal of 688676136 is 631676886.

It is a happy number.

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, 75030 + ... + 83706.

It is an arithmetic number, because the mean of its divisors is an integer number (53825295).

Almost surely, 2^688676136 is an apocalyptic number.

It is an amenable number.

688676136 is an abundant number, since it is smaller than the sum of its proper divisors (1033733304).

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

688676136 is a wasteful number, since it uses less digits than its factorization.

688676136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11993 (or 11989 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 51.

The square root of 688676136 is about 26242.6396538153. The cubic root of 688676136 is about 883.0900904075.

The spelling of 688676136 in words is "six hundred eighty-eight million, six hundred seventy-six thousand, one hundred thirty-six".