28318109708 has 12 divisors (see below), whose sum is σ = 56636219472. Its totient is φ = 12136332720.

The previous prime is 28318109693. The next prime is 28318109777. The reversal of 28318109708 is 80790181382.

28318109708 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505680503 + ... + 505680558.

It is an arithmetic number, because the mean of its divisors is an integer number (4719684956).

Almost surely, 2^28318109708 is an apocalyptic number.

28318109708 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28318109708 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28318109708 is a wasteful number, since it uses less digits than its factorization.

28318109708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011361072 (or 1011361070 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 47.

The spelling of 28318109708 in words is "twenty-eight billion, three hundred eighteen million, one hundred nine thousand, seven hundred eight".