28904715139 has 2 divisors, whose sum is σ = 28904715140. Its totient is φ = 28904715138.

The previous prime is 28904715109. The next prime is 28904715233. The reversal of 28904715139 is 93151740982.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28904715139 - 2⁷ = 28904715011 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28904715092 and 28904715101.

It is not a weakly prime, because it can be changed into another prime (28904715109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14452357569 + 14452357570.

It is an arithmetic number, because the mean of its divisors is an integer number (14452357570).

Almost surely, 2^28904715139 is an apocalyptic number.

28904715139 is a deficient number, since it is larger than the sum of its proper divisors (1).

28904715139 is an equidigital number, since it uses as much as digits as its factorization.

28904715139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 49.

The spelling of 28904715139 in words is "twenty-eight billion, nine hundred four million, seven hundred fifteen thousand, one hundred thirty-nine".