189936672 has 24 divisors (see below), whose sum is σ = 498584016. Its totient is φ = 63312192.

The previous prime is 189936671. The next prime is 189936697. The reversal of 189936672 is 276639981.

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (189936671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 989158 + ... + 989349.

It is an arithmetic number, because the mean of its divisors is an integer number (20774334).

Almost surely, 2^189936672 is an apocalyptic number.

189936672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

189936672 is an abundant number, since it is smaller than the sum of its proper divisors (308647344).

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

189936672 is a wasteful number, since it uses less digits than its factorization.

189936672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1978520 (or 1978512 counting only the distinct ones).

The product of its digits is 979776, while the sum is 51.

The square root of 189936672 is about 13781.7514126471. The cubic root of 189936672 is about 574.8258295418.

The spelling of 189936672 in words is "one hundred eighty-nine million, nine hundred thirty-six thousand, six hundred seventy-two".