189515312 has 40 divisors (see below), whose sum is σ = 424972800. Its totient is φ = 80188992.

The previous prime is 189515309. The next prime is 189515317. The reversal of 189515312 is 213515981.

It is not an unprimeable number, because it can be changed into a prime (189515317) by changing a digit.

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, 1862 + ... + 19557.

It is an arithmetic number, because the mean of its divisors is an integer number (10624320).

Almost surely, 2^189515312 is an apocalyptic number.

It is an amenable number.

189515312 is an abundant number, since it is smaller than the sum of its proper divisors (235457488).

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

189515312 is a wasteful number, since it uses less digits than its factorization.

189515312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21513 (or 21507 counting only the distinct ones).

The product of its digits is 10800, while the sum is 35.

The square root of 189515312 is about 13766.4560435865. The cubic root of 189515312 is about 574.4004457597.

The spelling of 189515312 in words is "one hundred eighty-nine million, five hundred fifteen thousand, three hundred twelve".