189368644 has 48 divisors (see below), whose sum is σ = 362226816. Its totient is φ = 86284800.

The previous prime is 189368639. The next prime is 189368671. The reversal of 189368644 is 446863981.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 294187 + ... + 294829.

It is an arithmetic number, because the mean of its divisors is an integer number (7546392).

Almost surely, 2^189368644 is an apocalyptic number.

It is an amenable number.

189368644 is a deficient number, since it is larger than the sum of its proper divisors (172858172).

189368644 is a wasteful number, since it uses less digits than its factorization.

189368644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796 (or 794 counting only the distinct ones).

The product of its digits is 995328, while the sum is 49.

The square root of 189368644 is about 13761.1280060902. The cubic root of 189368644 is about 574.2522292277.

The spelling of 189368644 in words is "one hundred eighty-nine million, three hundred sixty-eight thousand, six hundred forty-four".