189204864 has 32 divisors (see below), whose sum is σ = 502576440. Its totient is φ = 63068160.

The previous prime is 189204853. The next prime is 189204871. The reversal of 189204864 is 468402981.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×189204864² = 71596961122516992, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 245977 + ... + 246744.

Almost surely, 2^189204864 is an apocalyptic number.

It is an amenable number.

189204864 is an abundant number, since it is smaller than the sum of its proper divisors (313371576).

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

189204864 is an equidigital number, since it uses as much as digits as its factorization.

189204864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492738 (or 492726 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 189204864 is about 13755.1758985482. The cubic root of 189204864 is about 574.0866295535.

The spelling of 189204864 in words is "one hundred eighty-nine million, two hundred four thousand, eight hundred sixty-four".