28977392322 has 18 divisors (see below), whose sum is σ = 62785914867. Its totient is φ = 9658890036.

The previous prime is 28977392317. The next prime is 28977392341. The reversal of 28977392322 is 22329377982.

28977392322 is a `hidden beast` number, since 289 + 7 + 7 + 39 + 2 + 322 = 666.

It can be written as a sum of positive squares in only one way, i.e., 14488696161 + 14488696161 = 120369^2 + 120369^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=120369.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 702153 + ... + 742275.

Almost surely, 2^28977392322 is an apocalyptic number.

28977392322 is an abundant number, since it is smaller than the sum of its proper divisors (33808522545).

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

28977392322 is an frugal number, since it uses more digits than its factorization.

28977392322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80254 (or 40128 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 54.

The spelling of 28977392322 in words is "twenty-eight billion, nine hundred seventy-seven million, three hundred ninety-two thousand, three hundred twenty-two".