189838872 has 192 divisors, whose sum is σ = 572832000. Its totient is φ = 56593152.

The previous prime is 189838867. The next prime is 189838879. The reversal of 189838872 is 278838981.

189838872 is digitally balanced in base 3, 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 (189838879) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2833383 + ... + 2833449.

It is an arithmetic number, because the mean of its divisors is an integer number (2983500).

Almost surely, 2^189838872 is an apocalyptic number.

189838872 is a gapful number since it is divisible by the number (12) 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 189838872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286416000).

189838872 is an abundant number, since it is smaller than the sum of its proper divisors (382993128).

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

189838872 is a wasteful number, since it uses less digits than its factorization.

189838872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190 (or 183 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 54.

The square root of 189838872 is about 13778.2027855595. The cubic root of 189838872 is about 574.7271517083.

The spelling of 189838872 in words is "one hundred eighty-nine million, eight hundred thirty-eight thousand, eight hundred seventy-two".