28015800372 has 72 divisors (see below), whose sum is σ = 84492112320. Its totient is φ = 8004512880.

The previous prime is 28015800359. The next prime is 28015800377. The reversal of 28015800372 is 27300851082.

28015800372 is a `hidden beast` number, since 2 + 8 + 0 + 1 + 580 + 0 + 3 + 72 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28015800377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2641704 + ... + 2652287.

It is an arithmetic number, because the mean of its divisors is an integer number (1173501560).

Almost surely, 2^28015800372 is an apocalyptic number.

It is an amenable number.

28015800372 is an abundant number, since it is smaller than the sum of its proper divisors (56476311948).

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

28015800372 is a wasteful number, since it uses less digits than its factorization.

28015800372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5294018 (or 5294003 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The spelling of 28015800372 in words is "twenty-eight billion, fifteen million, eight hundred thousand, three hundred seventy-two".