28317880240 has 160 divisors (see below), whose sum is σ = 72098885376. Its totient is φ = 10280832000.

The previous prime is 28317880211. The next prime is 28317880259. The reversal of 28317880240 is 4208871382.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21665667 + ... + 21666973.

Almost surely, 2^28317880240 is an apocalyptic number.

28317880240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28317880240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36049442688).

28317880240 is an abundant number, since it is smaller than the sum of its proper divisors (43781005136).

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

28317880240 is a wasteful number, since it uses less digits than its factorization.

28317880240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667 (or 1661 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 43.

The spelling of 28317880240 in words is "twenty-eight billion, three hundred seventeen million, eight hundred eighty thousand, two hundred forty".