28543996800 has 432 divisors, whose sum is σ = 111966167040. Its totient is φ = 6918912000.

The previous prime is 28543996769. The next prime is 28543996823. The reversal of 28543996800 is 869934582.

28543996800 is a `hidden beast` number, since 2 + 8 + 543 + 9 + 96 + 8 + 0 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 3480705 + ... + 3488895.

Almost surely, 2^28543996800 is an apocalyptic number.

28543996800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28543996800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55983083520).

28543996800 is an abundant number, since it is smaller than the sum of its proper divisors (83422170240).

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

28543996800 is a wasteful number, since it uses less digits than its factorization.

28543996800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8243 (or 8212 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The spelling of 28543996800 in words is "twenty-eight billion, five hundred forty-three million, nine hundred ninety-six thousand, eight hundred".