1902399904 has 24 divisors (see below), whose sum is σ = 3746715588. Its totient is φ = 950853120.

The previous prime is 1902399901. The next prime is 1902399911. The reversal of 1902399904 is 4099932091.

It can be written as a sum of positive squares in 2 ways, for example, as 1769043600 + 133356304 = 42060^2 + 11548^2 .

It is not an unprimeable number, because it can be changed into a prime (1902399901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93844 + ... + 112300.

Almost surely, 2^1902399904 is an apocalyptic number.

It is an amenable number.

1902399904 is a deficient number, since it is larger than the sum of its proper divisors (1844315684).

1902399904 is a wasteful number, since it uses less digits than its factorization.

1902399904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21688 (or 21680 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 46.

The square root of 1902399904 is about 43616.5095348080. The cubic root of 1902399904 is about 1239.0835892910.

The spelling of 1902399904 in words is "one billion, nine hundred two million, three hundred ninety-nine thousand, nine hundred four".