108991656 has 40 divisors (see below), whose sum is σ = 305279370. Its totient is φ = 36330336.

The previous prime is 108991651. The next prime is 108991669. The reversal of 108991656 is 656199801.

It can be written as a sum of positive squares in only one way, i.e., 76842756 + 32148900 = 8766^2 + 5670^2 .

It is not an unprimeable number, because it can be changed into a prime (108991651) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 83451 + ... + 84746.

Almost surely, 2^108991656 is an apocalyptic number.

It is an amenable number.

108991656 is an abundant number, since it is smaller than the sum of its proper divisors (196287714).

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

108991656 is a wasteful number, since it uses less digits than its factorization.

108991656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168215 (or 168202 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 108991656 is about 10439.9068961366. The cubic root of 108991656 is about 477.6734287747.

The spelling of 108991656 in words is "one hundred eight million, nine hundred ninety-one thousand, six hundred fifty-six".