28766889522 has 54 divisors (see below), whose sum is σ = 72517000959. Its totient is φ = 8217672120.

The previous prime is 28766889511. The next prime is 28766889527. The reversal of 28766889522 is 22598866782.

28766889522 is a `hidden beast` number, since 28 + 7 + 6 + 6 + 8 + 89 + 522 = 666.

It can be written as a sum of positive squares in only one way, i.e., 14383444761 + 14383444761 = 119931^2 + 119931^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=119931.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 28766889522.

It is not an unprimeable number, because it can be changed into a prime (28766889527) 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, 5034247 + ... + 5039957.

Almost surely, 2^28766889522 is an apocalyptic number.

28766889522 is an abundant number, since it is smaller than the sum of its proper divisors (43750111437).

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

28766889522 is an frugal number, since it uses more digits than its factorization.

28766889522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11444 (or 5723 counting only the distinct ones).

The product of its digits is 46448640, while the sum is 63.

The spelling of 28766889522 in words is "twenty-eight billion, seven hundred sixty-six million, eight hundred eighty-nine thousand, five hundred twenty-two".