28076708138 has 16 divisors (see below), whose sum is σ = 42253298880. Its totient is φ = 13992302016.

The previous prime is 28076708129. The next prime is 28076708161. The reversal of 28076708138 is 83180767082.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3689045 + ... + 3696647.

It is an arithmetic number, because the mean of its divisors is an integer number (2640831180).

Almost surely, 2^28076708138 is an apocalyptic number.

28076708138 is a deficient number, since it is larger than the sum of its proper divisors (14176590742).

28076708138 is a wasteful number, since it uses less digits than its factorization.

28076708138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13421.

The product of its (nonzero) digits is 903168, while the sum is 50.

The spelling of 28076708138 in words is "twenty-eight billion, seventy-six million, seven hundred eight thousand, one hundred thirty-eight".