28609915392 has 200 divisors, whose sum is σ = 86190102900. Its totient is φ = 9447653376.

The previous prime is 28609915387. The next prime is 28609915463. The reversal of 28609915392 is 29351990682.

It is a happy number.

28609915392 is a `hidden beast` number, since 28 + 609 + 9 + 1 + 5 + 3 + 9 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 26995804416 + 1614110976 = 164304^2 + 40176^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4517284 + ... + 4523612.

Almost surely, 2^28609915392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28609915392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43095051450).

28609915392 is an abundant number, since it is smaller than the sum of its proper divisors (57580187508).

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

28609915392 is an equidigital number, since it uses as much as digits as its factorization.

28609915392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6468 (or 6443 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 54.

The spelling of 28609915392 in words is "twenty-eight billion, six hundred nine million, nine hundred fifteen thousand, three hundred ninety-two".