28622874681 has 12 divisors (see below), whose sum is σ = 41352567360. Its totient is φ = 19078032600.

The previous prime is 28622874673. The next prime is 28622874701. The reversal of 28622874681 is 18647822682.

28622874681 is a `hidden beast` number, since 2 + 8 + 622 + 8 + 7 + 4 + 6 + 8 + 1 = 666.

It is not a de Polignac number, because 28622874681 - 2³ = 28622874673 is a prime.

It is a super-2 number, since 2×28622874681² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (28622874601) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 276621 + ... + 365738.

It is an arithmetic number, because the mean of its divisors is an integer number (3446047280).

Almost surely, 2^28622874681 is an apocalyptic number.

It is an amenable number.

28622874681 is a deficient number, since it is larger than the sum of its proper divisors (12729692679).

28622874681 is a wasteful number, since it uses less digits than its factorization.

28622874681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647316 (or 647313 counting only the distinct ones).

The product of its digits is 4128768, while the sum is 54.

The spelling of 28622874681 in words is "twenty-eight billion, six hundred twenty-two million, eight hundred seventy-four thousand, six hundred eighty-one".