189639312 has 40 divisors (see below), whose sum is σ = 494251104. Its totient is φ = 62651904.

The previous prime is 189639299. The next prime is 189639343. The reversal of 189639312 is 213936981.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12058 + ... + 22905.

Almost surely, 2^189639312 is an apocalyptic number.

189639312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

189639312 is an abundant number, since it is smaller than the sum of its proper divisors (304611792).

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

189639312 is a wasteful number, since it uses less digits than its factorization.

189639312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35087 (or 35081 counting only the distinct ones).

The product of its digits is 69984, while the sum is 42.

The square root of 189639312 is about 13770.9590079994. The cubic root of 189639312 is about 574.5256953166.

The spelling of 189639312 in words is "one hundred eighty-nine million, six hundred thirty-nine thousand, three hundred twelve".