189931392 has 160 divisors (see below), whose sum is σ = 646227120. Its totient is φ = 54245376.

The previous prime is 189931381. The next prime is 189931453. The reversal of 189931392 is 293139981.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 71268 + ... + 73884.

Almost surely, 2^189931392 is an apocalyptic number.

189931392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189931392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (323113560).

189931392 is an abundant number, since it is smaller than the sum of its proper divisors (456295728).

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

189931392 is an equidigital number, since it uses as much as digits as its factorization.

189931392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2650 (or 2629 counting only the distinct ones).

The product of its digits is 104976, while the sum is 45.

The square root of 189931392 is about 13781.5598536595. The cubic root of 189931392 is about 574.8205030147.

The spelling of 189931392 in words is "one hundred eighty-nine million, nine hundred thirty-one thousand, three hundred ninety-two".