28108163680 has 24 divisors (see below), whose sum is σ = 66405537072. Its totient is φ = 11243265408.

The previous prime is 28108163669. The next prime is 28108163687. The reversal of 28108163680 is 8636180182.

It is a super-2 number, since 2×28108163680² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28108163687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87837852 + ... + 87838171.

It is an arithmetic number, because the mean of its divisors is an integer number (2766897378).

Almost surely, 2^28108163680 is an apocalyptic number.

28108163680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28108163680 is an abundant number, since it is smaller than the sum of its proper divisors (38297373392).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28108163680 is a wasteful number, since it uses less digits than its factorization.

28108163680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175676038 (or 175676030 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 43.

The spelling of 28108163680 in words is "twenty-eight billion, one hundred eight million, one hundred sixty-three thousand, six hundred eighty".