189931072 has 28 divisors (see below), whose sum is σ = 399067020. Its totient is φ = 89378816.

The previous prime is 189931061. The next prime is 189931081. The reversal of 189931072 is 270139981.

It can be written as a sum of positive squares in 2 ways, for example, as 124902976 + 65028096 = 11176^2 + 8064^2 .

It is a super-2 number, since 2×189931072² = 72147624222138368, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86197 + ... + 88372.

Almost surely, 2^189931072 is an apocalyptic number.

It is an amenable number.

189931072 is an abundant number, since it is smaller than the sum of its proper divisors (209135948).

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

189931072 is a wasteful number, since it uses less digits than its factorization.

189931072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174598 (or 174588 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 189931072 is about 13781.5482439383. The cubic root of 189931072 is about 574.8201801917.

The spelling of 189931072 in words is "one hundred eighty-nine million, nine hundred thirty-one thousand, seventy-two".