28023227136 has 54 divisors (see below), whose sum is σ = 80797878980. Its totient is φ = 9341074944.

The previous prime is 28023227123. The next prime is 28023227137. The reversal of 28023227136 is 63172232082.

28023227136 is a `hidden beast` number, since 280 + 23 + 227 + 136 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 28023227136.

It is not an unprimeable number, because it can be changed into a prime (28023227137) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6079126 + ... + 6083733.

Almost surely, 2^28023227136 is an apocalyptic number.

It is an amenable number.

28023227136 is an abundant number, since it is smaller than the sum of its proper divisors (52774651844).

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

28023227136 is a wasteful number, since it uses less digits than its factorization.

28023227136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12162881 (or 12162864 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The spelling of 28023227136 in words is "twenty-eight billion, twenty-three million, two hundred twenty-seven thousand, one hundred thirty-six".