28866635904 has 64 divisors (see below), whose sum is σ = 77821503840. Its totient is φ = 9478588416.

The previous prime is 28866635899. The next prime is 28866635909. The reversal of 28866635904 is 40953666882.

It is an interprime number because it is at equal distance from previous prime (28866635899) and next prime (28866635909).

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (28866635909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 535269 + ... + 586724.

Almost surely, 2^28866635904 is an apocalyptic number.

28866635904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28866635904 is an abundant number, since it is smaller than the sum of its proper divisors (48954867936).

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

28866635904 is a wasteful number, since it uses less digits than its factorization.

28866635904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122077 (or 1122065 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 57.

The spelling of 28866635904 in words is "twenty-eight billion, eight hundred sixty-six million, six hundred thirty-five thousand, nine hundred four".