189264720 has 40 divisors (see below), whose sum is σ = 586721376. Its totient is φ = 50470528.

The previous prime is 189264707. The next prime is 189264737. The reversal of 189264720 is 27462981.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×189264720² = 71642268473356800, which contains 22 as substring.

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, 394062 + ... + 394541.

Almost surely, 2^189264720 is an apocalyptic number.

189264720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189264720 is an abundant number, since it is smaller than the sum of its proper divisors (397456656).

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

189264720 is a wasteful number, since it uses less digits than its factorization.

189264720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788619 (or 788613 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 189264720 is about 13757.3514892947. The cubic root of 189264720 is about 574.1471616589.

The spelling of 189264720 in words is "one hundred eighty-nine million, two hundred sixty-four thousand, seven hundred twenty".