28899239839 has 2 divisors, whose sum is σ = 28899239840. Its totient is φ = 28899239838.

The previous prime is 28899239807. The next prime is 28899239851. The reversal of 28899239839 is 93893299882.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28899239839 - 2⁵ = 28899239807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28899239899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14449619919 + 14449619920.

It is an arithmetic number, because the mean of its divisors is an integer number (14449619920).

Almost surely, 2^28899239839 is an apocalyptic number.

28899239839 is a deficient number, since it is larger than the sum of its proper divisors (1).

28899239839 is an equidigital number, since it uses as much as digits as its factorization.

28899239839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120932352, while the sum is 70.

The spelling of 28899239839 in words is "twenty-eight billion, eight hundred ninety-nine million, two hundred thirty-nine thousand, eight hundred thirty-nine".