688086392 has 32 divisors (see below), whose sum is σ = 1505848320. Its totient is φ = 288618720.

The previous prime is 688086391. The next prime is 688086397. The reversal of 688086392 is 293680886.

It is a self number, because there is not a number n which added to its sum of digits gives 688086392.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688086391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128084 + ... + 133347.

It is an arithmetic number, because the mean of its divisors is an integer number (47057760).

Almost surely, 2^688086392 is an apocalyptic number.

It is an amenable number.

688086392 is an abundant number, since it is smaller than the sum of its proper divisors (817761928).

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

688086392 is a wasteful number, since it uses less digits than its factorization.

688086392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261491 (or 261487 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 50.

The square root of 688086392 is about 26231.4008775742. The cubic root of 688086392 is about 882.8379419803.

The spelling of 688086392 in words is "six hundred eighty-eight million, eighty-six thousand, three hundred ninety-two".