28507550400 has 672 divisors, whose sum is σ = 122637864960. Its totient is φ = 6303744000.

The previous prime is 28507550381. The next prime is 28507550411. The reversal of 28507550400 is 405570582.

It is a happy number.

28507550400 is a `hidden beast` number, since 2 + 85 + 0 + 75 + 504 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (672).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 9372880 + ... + 9375920.

Almost surely, 2^28507550400 is an apocalyptic number.

28507550400 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 28507550400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61318932480).

28507550400 is an abundant number, since it is smaller than the sum of its proper divisors (94130314560).

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

28507550400 is a wasteful number, since it uses less digits than its factorization.

28507550400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3110 (or 3089 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 36.

The spelling of 28507550400 in words is "twenty-eight billion, five hundred seven million, five hundred fifty thousand, four hundred".