9975720 has 64 divisors (see below), whose sum is σ = 30456000. Its totient is φ = 2613248.

The previous prime is 9975709. The next prime is 9975727. The reversal of 9975720 is 275799.

It is not an unprimeable number, because it can be changed into a prime (9975727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6376 + ... + 7784.

It is an arithmetic number, because the mean of its divisors is an integer number (475875).

Almost surely, 2^9975720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9975720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15228000).

9975720 is an abundant number, since it is smaller than the sum of its proper divisors (20480280).

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

9975720 is a wasteful number, since it uses less digits than its factorization.

9975720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1482 (or 1478 counting only the distinct ones).

The product of its (nonzero) digits is 39690, while the sum is 39.

The square root of 9975720 is about 3158.4363219796. The cubic root of 9975720 is about 215.2689621117.

The spelling of 9975720 in words is "nine million, nine hundred seventy-five thousand, seven hundred twenty".