28108134508 has 12 divisors (see below), whose sum is σ = 49190490720. Its totient is φ = 14053708592.

The previous prime is 28108134503. The next prime is 28108134511. The reversal of 28108134508 is 80543180182.

It is not an unprimeable number, because it can be changed into a prime (28108134503) 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, 170610 + ... + 292102.

It is an arithmetic number, because the mean of its divisors is an integer number (4099207560).

Almost surely, 2^28108134508 is an apocalyptic number.

It is an amenable number.

28108134508 is a deficient number, since it is larger than the sum of its proper divisors (21082356212).

28108134508 is a wasteful number, since it uses less digits than its factorization.

28108134508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179336 (or 179334 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 40.

It can be divided in two parts, 2810 and 8134508, that added together give a palindrome (8137318).

The spelling of 28108134508 in words is "twenty-eight billion, one hundred eight million, one hundred thirty-four thousand, five hundred eight".