189915136 has 56 divisors (see below), whose sum is σ = 385328160. Its totient is φ = 93585408.

The previous prime is 189915119. The next prime is 189915151. The reversal of 189915136 is 631519981.

It is a junction number, because it is equal to n+sod(n) for n = 189915092 and 189915101.

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, 794505 + ... + 794743.

It is an arithmetic number, because the mean of its divisors is an integer number (6880860).

Almost surely, 2^189915136 is an apocalyptic number.

189915136 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 189915136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192664080).

189915136 is an abundant number, since it is smaller than the sum of its proper divisors (195413024).

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

189915136 is an frugal number, since it uses more digits than its factorization.

189915136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362 (or 338 counting only the distinct ones).

The product of its digits is 58320, while the sum is 43.

The square root of 189915136 is about 13780.9700674517. The cubic root of 189915136 is about 574.8041031477.

The spelling of 189915136 in words is "one hundred eighty-nine million, nine hundred fifteen thousand, one hundred thirty-six".