28808864400 has 60 divisors (see below), whose sum is σ = 92284399472. Its totient is φ = 7682363520.

The previous prime is 28808864299. The next prime is 28808864401. The reversal of 28808864400 is 446880882.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 28808864400.

It is not an unprimeable number, because it can be changed into a prime (28808864401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12002494 + ... + 12004893.

Almost surely, 2^28808864400 is an apocalyptic number.

28808864400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28808864400 is an abundant number, since it is smaller than the sum of its proper divisors (63475535072).

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

28808864400 is a wasteful number, since it uses less digits than its factorization.

28808864400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24007408 (or 24007397 counting only the distinct ones).

The product of its (nonzero) digits is 786432, while the sum is 48.

The spelling of 28808864400 in words is "twenty-eight billion, eight hundred eight million, eight hundred sixty-four thousand, four hundred".