28375794720 has 1536 divisors, whose sum is σ = 134120448000. Its totient is φ = 5434490880.

The previous prime is 28375794703. The next prime is 28375794721. The reversal of 28375794720 is 2749757382.

28375794720 is a `hidden beast` number, since 2 + 8 + 3 + 7 + 579 + 47 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (28375794721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 216609055 + ... + 216609185.

It is an arithmetic number, because the mean of its divisors is an integer number (87318000).

Almost surely, 2^28375794720 is an apocalyptic number.

28375794720 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 28375794720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67060224000).

28375794720 is an abundant number, since it is smaller than the sum of its proper divisors (105744653280).

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

28375794720 is a wasteful number, since it uses less digits than its factorization.

28375794720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223 (or 209 counting only the distinct ones).

The product of its (nonzero) digits is 5927040, while the sum is 54.

The spelling of 28375794720 in words is "twenty-eight billion, three hundred seventy-five million, seven hundred ninety-four thousand, seven hundred twenty".