188468640 has 96 divisors (see below), whose sum is σ = 659655360. Its totient is φ = 50257152.

The previous prime is 188468633. The next prime is 188468659. The reversal of 188468640 is 46864881.

188468640 is a `hidden beast` number, since 188 + 468 + 6 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17494 + ... + 26133.

It is an arithmetic number, because the mean of its divisors is an integer number (6871410).

Almost surely, 2^188468640 is an apocalyptic number.

188468640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

188468640 is an abundant number, since it is smaller than the sum of its proper divisors (471186720).

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

188468640 is a wasteful number, since it uses less digits than its factorization.

188468640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43651 (or 43637 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 45.

The square root of 188468640 is about 13728.3881064020. The cubic root of 188468640 is about 573.3410431029.

The spelling of 188468640 in words is "one hundred eighty-eight million, four hundred sixty-eight thousand, six hundred forty".