688385118 has 16 divisors (see below), whose sum is σ = 1377910656. Its totient is φ = 229271640.

The previous prime is 688385107. The next prime is 688385123. The reversal of 688385118 is 811583886.

It is a Curzon number.

It is a congruent 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, 39568 + ... + 54243.

It is an arithmetic number, because the mean of its divisors is an integer number (86119416).

Almost surely, 2^688385118 is an apocalyptic number.

688385118 is an abundant number, since it is smaller than the sum of its proper divisors (689525538).

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

688385118 is a wasteful number, since it uses less digits than its factorization.

688385118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95039.

The product of its digits is 368640, while the sum is 48.

The square root of 688385118 is about 26237.0943132047. The cubic root of 688385118 is about 882.9656819921.

The spelling of 688385118 in words is "six hundred eighty-eight million, three hundred eighty-five thousand, one hundred eighteen".