189432380 has 12 divisors (see below), whose sum is σ = 397808040. Its totient is φ = 75772944.

The previous prime is 189432371. The next prime is 189432391. The reversal of 189432380 is 83234981.

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, 4735790 + ... + 4735829.

It is an arithmetic number, because the mean of its divisors is an integer number (33150670).

Almost surely, 2^189432380 is an apocalyptic number.

189432380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189432380 is an abundant number, since it is smaller than the sum of its proper divisors (208375660).

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

189432380 is a wasteful number, since it uses less digits than its factorization.

189432380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9471628 (or 9471626 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 189432380 is about 13763.4436097948. The cubic root of 189432380 is about 574.3166475563.

The spelling of 189432380 in words is "one hundred eighty-nine million, four hundred thirty-two thousand, three hundred eighty".