9912320 has 90 divisors (see below), whose sum is σ = 26148066. Its totient is φ = 3604480.

The previous prime is 9912313. The next prime is 9912391. The reversal of 9912320 is 232199.

It can be written as a sum of positive squares in only one way, i.e., 7929856 + 1982464 = 2816^2 + 1408^2 .

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 9912320.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 901115 + ... + 901125.

Almost surely, 2^9912320 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 9912320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13074033).

9912320 is an abundant number, since it is smaller than the sum of its proper divisors (16235746).

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

9912320 is an equidigital number, since it uses as much as digits as its factorization.

9912320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55 (or 18 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 9912320 is about 3148.3837123197. The cubic root of 9912320 is about 214.8119502268.

The spelling of 9912320 in words is "nine million, nine hundred twelve thousand, three hundred twenty".