28318370920 has 64 divisors (see below), whose sum is σ = 73525720320. Its totient is φ = 9614882304.

The previous prime is 28318370917. The next prime is 28318370939. The reversal of 28318370920 is 2907381382.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 462117 + ... + 519796.

It is an arithmetic number, because the mean of its divisors is an integer number (1148839380).

Almost surely, 2^28318370920 is an apocalyptic number.

28318370920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28318370920 is an abundant number, since it is smaller than the sum of its proper divisors (45207349400).

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

28318370920 is a wasteful number, since it uses less digits than its factorization.

28318370920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 982034 (or 982030 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 28318370920 in words is "twenty-eight billion, three hundred eighteen million, three hundred seventy thousand, nine hundred twenty".