28293625639 has 2 divisors, whose sum is σ = 28293625640. Its totient is φ = 28293625638.

The previous prime is 28293625621. The next prime is 28293625663. The reversal of 28293625639 is 93652639282.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28293625639 - 2²⁷ = 28159407911 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28293625639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28293625609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14146812819 + 14146812820.

It is an arithmetic number, because the mean of its divisors is an integer number (14146812820).

Almost surely, 2^28293625639 is an apocalyptic number.

28293625639 is a deficient number, since it is larger than the sum of its proper divisors (1).

28293625639 is an equidigital number, since it uses as much as digits as its factorization.

28293625639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8398080, while the sum is 55.

The spelling of 28293625639 in words is "twenty-eight billion, two hundred ninety-three million, six hundred twenty-five thousand, six hundred thirty-nine".