28423572800 has 168 divisors, whose sum is σ = 82688338560. Its totient is φ = 9409075200.

The previous prime is 28423572763. The next prime is 28423572811. The reversal of 28423572800 is 827532482.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 281045 + ... + 368555.

Almost surely, 2^28423572800 is an apocalyptic number.

28423572800 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 28423572800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41344169280).

28423572800 is an abundant number, since it is smaller than the sum of its proper divisors (54264765760).

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

28423572800 is a wasteful number, since it uses less digits than its factorization.

28423572800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87569 (or 87554 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 41.

The spelling of 28423572800 in words is "twenty-eight billion, four hundred twenty-three million, five hundred seventy-two thousand, eight hundred".