28976814639 has 8 divisors (see below), whose sum is σ = 42928614320. Its totient is φ = 19317876408.

The previous prime is 28976814617. The next prime is 28976814641. The reversal of 28976814639 is 93641867982.

28976814639 is a `hidden beast` number, since 2 + 8 + 97 + 6 + 81 + 463 + 9 = 666.

It is not a de Polignac number, because 28976814639 - 2⁹ = 28976814127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28976813639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 536607652 + ... + 536607705.

It is an arithmetic number, because the mean of its divisors is an integer number (5366076790).

Almost surely, 2^28976814639 is an apocalyptic number.

28976814639 is a deficient number, since it is larger than the sum of its proper divisors (13951799681).

28976814639 is a wasteful number, since it uses less digits than its factorization.

28976814639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073215366 (or 1073215360 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 63.

The spelling of 28976814639 in words is "twenty-eight billion, nine hundred seventy-six million, eight hundred fourteen thousand, six hundred thirty-nine".