28939137205 has 32 divisors (see below), whose sum is σ = 39545625600. Its totient is φ = 20138764800.

The previous prime is 28939137173. The next prime is 28939137251. The reversal of 28939137205 is 50273193982.

It is not a de Polignac number, because 28939137205 - 2⁵ = 28939137173 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56391 + ... + 247099.

It is an arithmetic number, because the mean of its divisors is an integer number (1235800800).

Almost surely, 2^28939137205 is an apocalyptic number.

It is an amenable number.

28939137205 is a deficient number, since it is larger than the sum of its proper divisors (10606488395).

28939137205 is a wasteful number, since it uses less digits than its factorization.

28939137205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190845.

The product of its (nonzero) digits is 816480, while the sum is 49.

The spelling of 28939137205 in words is "twenty-eight billion, nine hundred thirty-nine million, one hundred thirty-seven thousand, two hundred five".