28339974720 has 84 divisors (see below), whose sum is σ = 97477714620. Its totient is φ = 7557325824.

The previous prime is 28339974713. The next prime is 28339974727. The reversal of 28339974720 is 2747993382.

28339974720 is a `hidden beast` number, since 2 + 83 + 3 + 9 + 97 + 472 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (28339974713) and next prime (28339974727).

It can be written as a sum of positive squares in 2 ways, for example, as 13807190016 + 14532784704 = 117504^2 + 120552^2 .

It is not an unprimeable number, because it can be changed into a prime (28339974727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4917255 + ... + 4923014.

Almost surely, 2^28339974720 is an apocalyptic number.

28339974720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28339974720 is an abundant number, since it is smaller than the sum of its proper divisors (69137739900).

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

28339974720 is a wasteful number, since it uses less digits than its factorization.

28339974720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9840292 (or 9840279 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 54.

The spelling of 28339974720 in words is "twenty-eight billion, three hundred thirty-nine million, nine hundred seventy-four thousand, seven hundred twenty".