189195312 has 80 divisors (see below), whose sum is σ = 544786560. Its totient is φ = 56226816.

The previous prime is 189195311. The next prime is 189195317. The reversal of 189195312 is 213591981.

It is not an unprimeable number, because it can be changed into a prime (189195311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9403 + ... + 21605.

It is an arithmetic number, because the mean of its divisors is an integer number (6809832).

Almost surely, 2^189195312 is an apocalyptic number.

189195312 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 189195312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272393280).

189195312 is an abundant number, since it is smaller than the sum of its proper divisors (355591248).

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

189195312 is a wasteful number, since it uses less digits than its factorization.

189195312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12250 (or 12244 counting only the distinct ones).

The product of its digits is 19440, while the sum is 39.

The square root of 189195312 is about 13754.8286794129. The cubic root of 189195312 is about 574.0769684774.

The spelling of 189195312 in words is "one hundred eighty-nine million, one hundred ninety-five thousand, three hundred twelve".