28937502720 has 900 divisors, whose sum is σ = 122036759460. Its totient is φ = 6539968512.

The previous prime is 28937502689. The next prime is 28937502817. The reversal of 28937502720 is 2720573982.

28937502720 is a `hidden beast` number, since 2 + 8 + 9 + 375 + 0 + 272 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7868399616 + 21069103104 = 88704^2 + 145152^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 325140436 + ... + 325140524.

Almost surely, 2^28937502720 is an apocalyptic number.

28937502720 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 28937502720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61018379730).

28937502720 is an abundant number, since it is smaller than the sum of its proper divisors (93099256740).

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

28937502720 is an frugal number, since it uses more digits than its factorization.

28937502720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148 (or 106 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The spelling of 28937502720 in words is "twenty-eight billion, nine hundred thirty-seven million, five hundred two thousand, seven hundred twenty".