189397904 has 20 divisors (see below), whose sum is σ = 368582064. Its totient is φ = 94279968.

The previous prime is 189397891. The next prime is 189397913. The reversal of 189397904 is 409793981.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22442 + ... + 29705.

Almost surely, 2^189397904 is an apocalyptic number.

It is an amenable number.

189397904 is a deficient number, since it is larger than the sum of its proper divisors (179184160).

189397904 is a wasteful number, since it uses less digits than its factorization.

189397904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52382 (or 52376 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 189397904 is about 13762.1911046170. The cubic root of 189397904 is about 574.2818042663.

The spelling of 189397904 in words is "one hundred eighty-nine million, three hundred ninety-seven thousand, nine hundred four".