28815771239 has 6 divisors (see below), whose sum is σ = 30610525464. Its totient is φ = 27120725600.

The previous prime is 28815771223. The next prime is 28815771247. The reversal of 28815771239 is 93217751882.

It is not a de Polignac number, because 28815771239 - 2⁴ = 28815771223 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 (28815771209) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 49853987 + ... + 49854564.

It is an arithmetic number, because the mean of its divisors is an integer number (5101754244).

Almost surely, 2^28815771239 is an apocalyptic number.

28815771239 is a deficient number, since it is larger than the sum of its proper divisors (1794754225).

28815771239 is an equidigital number, since it uses as much as digits as its factorization.

28815771239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99708585 (or 99708568 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 53.

The spelling of 28815771239 in words is "twenty-eight billion, eight hundred fifteen million, seven hundred seventy-one thousand, two hundred thirty-nine".