2189004904 has 8 divisors (see below), whose sum is σ = 4104384210. Its totient is φ = 1094502448.

The previous prime is 2189004889. The next prime is 2189004959. The reversal of 2189004904 is 4094009812.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1756448100 + 432556804 = 41910^2 + 20798^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136812799 + ... + 136812814.

Almost surely, 2^2189004904 is an apocalyptic number.

It is an amenable number.

2189004904 is a deficient number, since it is larger than the sum of its proper divisors (1915379306).

2189004904 is a wasteful number, since it uses less digits than its factorization.

2189004904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273625619 (or 273625615 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 2189004904 is about 46786.8026691288. The cubic root of 2189004904 is about 1298.4211412298.

The spelling of 2189004904 in words is "two billion, one hundred eighty-nine million, four thousand, nine hundred four".