188491264 has 40 divisors (see below), whose sum is σ = 405599040. Its totient is φ = 86992896.

The previous prime is 188491249. The next prime is 188491319. The reversal of 188491264 is 462194881.

It is a self number, because there is not a number n which added to its sum of digits gives 188491264.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7504 + ... + 20815.

It is an arithmetic number, because the mean of its divisors is an integer number (10139976).

Almost surely, 2^188491264 is an apocalyptic number.

It is an amenable number.

188491264 is an abundant number, since it is smaller than the sum of its proper divisors (217107776).

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

188491264 is an equidigital number, since it uses as much as digits as its factorization.

188491264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28350 (or 28334 counting only the distinct ones).

The product of its digits is 110592, while the sum is 43.

The square root of 188491264 is about 13729.2120677044. The cubic root of 188491264 is about 573.3639836988.

The spelling of 188491264 in words is "one hundred eighty-eight million, four hundred ninety-one thousand, two hundred sixty-four".