28931371200 has 252 divisors, whose sum is σ = 105339096408. Its totient is φ = 7526707200.

The previous prime is 28931371163. The next prime is 28931371207. The reversal of 28931371200 is 217313982.

28931371200 is a `hidden beast` number, since 2 + 89 + 3 + 1 + 371 + 200 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (28931371207) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 565899 + ... + 614901.

Almost surely, 2^28931371200 is an apocalyptic number.

28931371200 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 28931371200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52669548204).

28931371200 is an abundant number, since it is smaller than the sum of its proper divisors (76407725208).

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

28931371200 is a wasteful number, since it uses less digits than its factorization.

28931371200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49072 (or 49054 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The spelling of 28931371200 in words is "twenty-eight billion, nine hundred thirty-one million, three hundred seventy-one thousand, two hundred".