28881177122 has 18 divisors (see below), whose sum is σ = 50397642747. Its totient is φ = 12376926324.

The previous prime is 28881177077. The next prime is 28881177139. The reversal of 28881177122 is 22177118882.

It can be written as a sum of positive squares in only one way, i.e., 14440588561 + 14440588561 = 120169^2 + 120169^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=120169.

It is a Duffinian number.

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, 1673783 + ... + 1690949.

Almost surely, 2^28881177122 is an apocalyptic number.

28881177122 is a deficient number, since it is larger than the sum of its proper divisors (21516465625).

28881177122 is an frugal number, since it uses more digits than its factorization.

28881177122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34350 (or 17176 counting only the distinct ones).

The product of its digits is 200704, while the sum is 47.

The spelling of 28881177122 in words is "twenty-eight billion, eight hundred eighty-one million, one hundred seventy-seven thousand, one hundred twenty-two".