189621912 has 32 divisors (see below), whose sum is σ = 474439680. Its totient is φ = 63156000.

The previous prime is 189621911. The next prime is 189621937. The reversal of 189621912 is 219126981.

189621912 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189621911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37537 + ... + 42287.

It is an arithmetic number, because the mean of its divisors is an integer number (14826240).

Almost surely, 2^189621912 is an apocalyptic number.

189621912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

189621912 is an abundant number, since it is smaller than the sum of its proper divisors (284817768).

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

189621912 is a wasteful number, since it uses less digits than its factorization.

189621912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6423 (or 6419 counting only the distinct ones).

The product of its digits is 15552, while the sum is 39.

The square root of 189621912 is about 13770.3272292273. The cubic root of 189621912 is about 574.5081232694.

The spelling of 189621912 in words is "one hundred eighty-nine million, six hundred twenty-one thousand, nine hundred twelve".