28760139139 has 4 divisors (see below), whose sum is σ = 28763247240. Its totient is φ = 28757031040.

The previous prime is 28760139059. The next prime is 28760139143. The reversal of 28760139139 is 93193106782.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93193106782 = 2 ⋅46596553391.

It is a cyclic number.

It is not a de Polignac number, because 28760139139 - 2¹³ = 28760130947 is a prime.

It is a super-2 number, since 2×28760139139² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28760139092 and 28760139101.

It is not an unprimeable number, because it can be changed into a prime (28760139179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1540129 + ... + 1558690.

It is an arithmetic number, because the mean of its divisors is an integer number (7190811810).

Almost surely, 2^28760139139 is an apocalyptic number.

28760139139 is a deficient number, since it is larger than the sum of its proper divisors (3108101).

28760139139 is an equidigital number, since it uses as much as digits as its factorization.

28760139139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3108100.

The product of its (nonzero) digits is 489888, while the sum is 49.

The spelling of 28760139139 in words is "twenty-eight billion, seven hundred sixty million, one hundred thirty-nine thousand, one hundred thirty-nine".