189215136 has 192 divisors, whose sum is σ = 617379840. Its totient is φ = 55883520.

The previous prime is 189215113. The next prime is 189215137. The reversal of 189215136 is 631512981.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 189215136.

It is not an unprimeable number, because it can be changed into a prime (189215137) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 408441 + ... + 408903.

It is an arithmetic number, because the mean of its divisors is an integer number (3215520).

Almost surely, 2^189215136 is an apocalyptic number.

189215136 is a gapful number since it is divisible by the number (16) 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 189215136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (308689920).

189215136 is an abundant number, since it is smaller than the sum of its proper divisors (428164704).

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

189215136 is a wasteful number, since it uses less digits than its factorization.

189215136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536 (or 522 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 189215136 is about 13755.5492801996. The cubic root of 189215136 is about 574.0970184886.

The spelling of 189215136 in words is "one hundred eighty-nine million, two hundred fifteen thousand, one hundred thirty-six".