189239424 has 128 divisors (see below), whose sum is σ = 556968960. Its totient is φ = 56448000.

The previous prime is 189239399. The next prime is 189239429. The reversal of 189239424 is 424932981.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (189239429) 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, 299589 + ... + 300219.

It is an arithmetic number, because the mean of its divisors is an integer number (4351320).

Almost surely, 2^189239424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189239424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278484480).

189239424 is an abundant number, since it is smaller than the sum of its proper divisors (367729536).

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

189239424 is a wasteful number, since it uses less digits than its factorization.

189239424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730 (or 718 counting only the distinct ones).

The product of its digits is 124416, while the sum is 42.

The square root of 189239424 is about 13756.4320955690. The cubic root of 189239424 is about 574.1215814844.

The spelling of 189239424 in words is "one hundred eighty-nine million, two hundred thirty-nine thousand, four hundred twenty-four".