189412520 has 128 divisors (see below), whose sum is σ = 495936000. Its totient is φ = 64385280.

The previous prime is 189412481. The next prime is 189412523. The reversal of 189412520 is 25214981.

It is not an unprimeable number, because it can be changed into a prime (189412523) 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, 1161959 + ... + 1162121.

It is an arithmetic number, because the mean of its divisors is an integer number (3874500).

Almost surely, 2^189412520 is an apocalyptic number.

189412520 is a gapful number since it is divisible by the number (10) 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 189412520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247968000).

189412520 is an abundant number, since it is smaller than the sum of its proper divisors (306523480).

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

189412520 is a wasteful number, since it uses less digits than its factorization.

189412520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343 (or 339 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 189412520 is about 13762.7221144656. The cubic root of 189412520 is about 574.2965764941.

The spelling of 189412520 in words is "one hundred eighty-nine million, four hundred twelve thousand, five hundred twenty".