189643672 has 8 divisors (see below), whose sum is σ = 355581900. Its totient is φ = 94821832.

The previous prime is 189643669. The next prime is 189643679. The reversal of 189643672 is 276346981.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189643679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11852722 + ... + 11852737.

Almost surely, 2^189643672 is an apocalyptic number.

It is an amenable number.

189643672 is a deficient number, since it is larger than the sum of its proper divisors (165938228).

189643672 is a wasteful number, since it uses less digits than its factorization.

189643672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23705465 (or 23705461 counting only the distinct ones).

The product of its digits is 435456, while the sum is 46.

The square root of 189643672 is about 13771.1173112424. The cubic root of 189643672 is about 574.5300982589.

The spelling of 189643672 in words is "one hundred eighty-nine million, six hundred forty-three thousand, six hundred seventy-two".