189905004 has 36 divisors (see below), whose sum is σ = 490255584. Its totient is φ = 61954272.

The previous prime is 189904993. The next prime is 189905029. The reversal of 189905004 is 400509981.

189905004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 189905004.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54427 + ... + 57810.

Almost surely, 2^189905004 is an apocalyptic number.

It is an amenable number.

189905004 is an abundant number, since it is smaller than the sum of its proper divisors (300350580).

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

189905004 is a wasteful number, since it uses less digits than its factorization.

189905004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112294 (or 112289 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 189905004 is about 13780.6024541745. The cubic root of 189905004 is about 574.7938810052.

The spelling of 189905004 in words is "one hundred eighty-nine million, nine hundred five thousand, four".