28157108620 has 24 divisors (see below), whose sum is σ = 61168892400. Its totient is φ = 10874469312.

The previous prime is 28157108563. The next prime is 28157108633. The reversal of 28157108620 is 2680175182.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24272790 + ... + 24273949.

It is an arithmetic number, because the mean of its divisors is an integer number (2548703850).

Almost surely, 2^28157108620 is an apocalyptic number.

28157108620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28157108620 is an abundant number, since it is smaller than the sum of its proper divisors (33011783780).

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

28157108620 is a wasteful number, since it uses less digits than its factorization.

28157108620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48546777 (or 48546775 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 40.

The spelling of 28157108620 in words is "twenty-eight billion, one hundred fifty-seven million, one hundred eight thousand, six hundred twenty".