189896564 has 96 divisors (see below), whose sum is σ = 417432960. Its totient is φ = 74304000.

The previous prime is 189896561. The next prime is 189896569. The reversal of 189896564 is 465698981.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189896561) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1097582 + ... + 1097754.

It is an arithmetic number, because the mean of its divisors is an integer number (4348260).

Almost surely, 2^189896564 is an apocalyptic number.

It is an amenable number.

189896564 is an abundant number, since it is smaller than the sum of its proper divisors (227536396).

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

189896564 is a wasteful number, since it uses less digits than its factorization.

189896564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321 (or 319 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 56.

The square root of 189896564 is about 13780.2962232312. The cubic root of 189896564 is about 574.7853656386.

The spelling of 189896564 in words is "one hundred eighty-nine million, eight hundred ninety-six thousand, five hundred sixty-four".