189856872 has 96 divisors (see below), whose sum is σ = 538137600. Its totient is φ = 62705664.

The previous prime is 189856819. The next prime is 189856883. The reversal of 189856872 is 278658981.

189856872 is a `hidden beast` number, since 1 + 8 + 9 + 8 + 568 + 72 = 666.

189856872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 246504 + ... + 247272.

It is an arithmetic number, because the mean of its divisors is an integer number (5605600).

Almost surely, 2^189856872 is an apocalyptic number.

189856872 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 189856872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269068800).

189856872 is an abundant number, since it is smaller than the sum of its proper divisors (348280728).

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

189856872 is a wasteful number, since it uses less digits than its factorization.

189856872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917 (or 901 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 54.

The square root of 189856872 is about 13778.8559757333. The cubic root of 189856872 is about 574.7453158171.

The spelling of 189856872 in words is "one hundred eighty-nine million, eight hundred fifty-six thousand, eight hundred seventy-two".