28140553920 has 224 divisors, whose sum is σ = 90956099520. Its totient is φ = 7369850880.

The previous prime is 28140553901. The next prime is 28140553939. The reversal of 28140553920 is 2935504182.

It is an interprime number because it is at equal distance from previous prime (28140553901) and next prime (28140553939).

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, 19691766 + ... + 19693194.

Almost surely, 2^28140553920 is an apocalyptic number.

28140553920 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 28140553920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45478049760).

28140553920 is an abundant number, since it is smaller than the sum of its proper divisors (62815545600).

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

28140553920 is a wasteful number, since it uses less digits than its factorization.

28140553920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1803 (or 1793 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 39.

The spelling of 28140553920 in words is "twenty-eight billion, one hundred forty million, five hundred fifty-three thousand, nine hundred twenty".