28371699720 has 864 divisors, whose sum is σ = 120285285120. Its totient is φ = 5774146560.

The previous prime is 28371699709. The next prime is 28371699737. The reversal of 28371699720 is 2799617382.

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 92415807 + ... + 92416113.

It is an arithmetic number, because the mean of its divisors is an integer number (139219080).

Almost surely, 2^28371699720 is an apocalyptic number.

28371699720 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 28371699720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60142642560).

28371699720 is an abundant number, since it is smaller than the sum of its proper divisors (91913585400).

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

28371699720 is a wasteful number, since it uses less digits than its factorization.

28371699720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395 (or 368 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 54.

The spelling of 28371699720 in words is "twenty-eight billion, three hundred seventy-one million, six hundred ninety-nine thousand, seven hundred twenty".