28900422639 has 12 divisors (see below), whose sum is σ = 45540060072. Its totient is φ = 17515407600.

The previous prime is 28900422619. The next prime is 28900422643. The reversal of 28900422639 is 93622400982.

28900422639 is a `hidden beast` number, since 2 + 8 + 9 + 0 + 0 + 4 + 2 + 2 + 639 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-28900422639 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28900422594 and 28900422603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28900422619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 145961632 + ... + 145961829.

It is an arithmetic number, because the mean of its divisors is an integer number (3795005006).

Almost surely, 2^28900422639 is an apocalyptic number.

28900422639 is a deficient number, since it is larger than the sum of its proper divisors (16639637433).

28900422639 is a wasteful number, since it uses less digits than its factorization.

28900422639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291923478 (or 291923475 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 28900422639 in words is "twenty-eight billion, nine hundred million, four hundred twenty-two thousand, six hundred thirty-nine".