9928440587520 has 864 divisors, whose sum is σ = 44137107786240. Its totient is φ = 2094787215360.

The previous prime is 9928440587503. The next prime is 9928440587543. The reversal of 9928440587520 is 257850448299.

9928440587520 is a `hidden beast` number, since 9 + 9 + 2 + 8 + 4 + 40 + 587 + 5 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (864).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

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, 21789225 + ... + 22240215.

Almost surely, 2^{9928440587520} is an apocalyptic number.

9928440587520 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 9928440587520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22068553893120).

9928440587520 is an abundant number, since it is smaller than the sum of its proper divisors (34208667198720).

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

9928440587520 is a wasteful number, since it uses less digits than its factorization.

9928440587520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451048 (or 451021 counting only the distinct ones).

The product of its (nonzero) digits is 58060800, while the sum is 63.

The spelling of 9928440587520 in words is "nine trillion, nine hundred twenty-eight billion, four hundred forty million, five hundred eighty-seven thousand, five hundred twenty".