28108134507 has 8 divisors (see below), whose sum is σ = 38490418576. Its totient is φ = 18232303392.

The previous prime is 28108134503. The next prime is 28108134511. The reversal of 28108134507 is 70543180182.

It is an interprime number because it is at equal distance from previous prime (28108134503) and next prime (28108134511).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28108134507 - 2² = 28108134503 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 126613108 + ... + 126613329.

It is an arithmetic number, because the mean of its divisors is an integer number (4811302322).

Almost surely, 2^28108134507 is an apocalyptic number.

28108134507 is a deficient number, since it is larger than the sum of its proper divisors (10382284069).

28108134507 is a wasteful number, since it uses less digits than its factorization.

28108134507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253226477.

The product of its (nonzero) digits is 53760, while the sum is 39.

The spelling of 28108134507 in words is "twenty-eight billion, one hundred eight million, one hundred thirty-four thousand, five hundred seven".