983999520 has 576 divisors, whose sum is σ = 4106059776. Its totient is φ = 209848320.

The previous prime is 983999507. The next prime is 983999561. The reversal of 983999520 is 25999389.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 14686527 + ... + 14686593.

It is an arithmetic number, because the mean of its divisors is an integer number (7128576).

Almost surely, 2^983999520 is an apocalyptic number.

983999520 is a gapful number since it is divisible by the number (90) 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 983999520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2053029888).

983999520 is an abundant number, since it is smaller than the sum of its proper divisors (3122060256).

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

983999520 is a wasteful number, since it uses less digits than its factorization.

983999520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173 (or 162 counting only the distinct ones).

The product of its (nonzero) digits is 1574640, while the sum is 54.

The square root of 983999520 is about 31368.7666317948. The cubic root of 983999520 is about 994.6378049239.

The spelling of 983999520 in words is "nine hundred eighty-three million, nine hundred ninety-nine thousand, five hundred twenty".