28108118031 has 16 divisors (see below), whose sum is σ = 42833779968. Its totient is φ = 16060896000.

The previous prime is 28108118011. The next prime is 28108118063. The reversal of 28108118031 is 13081180182.

It is not a de Polignac number, because 28108118031 - 2⁶ = 28108117967 is a prime.

It is a super-2 number, since 2×28108118031² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28108117983 and 28108118001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28108118011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 652191 + ... + 693951.

It is an arithmetic number, because the mean of its divisors is an integer number (2677111248).

Almost surely, 2^28108118031 is an apocalyptic number.

28108118031 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28108118031 is a deficient number, since it is larger than the sum of its proper divisors (14725661937).

28108118031 is a wasteful number, since it uses less digits than its factorization.

28108118031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73822.

The product of its (nonzero) digits is 3072, while the sum is 33.

The spelling of 28108118031 in words is "twenty-eight billion, one hundred eight million, one hundred eighteen thousand, thirty-one".