28644885504 has 297 divisors, whose sum is σ = 86795475429. Its totient is φ = 9098772480.

The previous prime is 28644885421. The next prime is 28644885509. The reversal of 28644885504 is 40558844682.

The square root of 28644885504 is 169248.

It is a perfect power (a square), and thus also a powerful number.

28644885504 is a `hidden beast` number, since 2 + 8 + 6 + 4 + 4 + 88 + 550 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1380271104 + 27264614400 = 37152^2 + 165120^2 .

It is not an unprimeable number, because it can be changed into a prime (28644885509) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 666160107 + ... + 666160149.

Almost surely, 2^28644885504 is an apocalyptic number.

28644885504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

28644885504 is the 169248-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28644885504

28644885504 is an abundant number, since it is smaller than the sum of its proper divisors (58150589925).

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

28644885504 is an equidigital number, since it uses as much as digits as its factorization.

28644885504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 9830400, while the sum is 54.

The spelling of 28644885504 in words is "twenty-eight billion, six hundred forty-four million, eight hundred eighty-five thousand, five hundred four".