9920624 has 40 divisors (see below), whose sum is σ = 22209888. Its totient is φ = 4204800.

The previous prime is 9920621. The next prime is 9920653. The reversal of 9920624 is 4260299.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9920621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10874 + ... + 11750.

Almost surely, 2^9920624 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 9920624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11104944).

9920624 is an abundant number, since it is smaller than the sum of its proper divisors (12289264).

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

9920624 is a wasteful number, since it uses less digits than its factorization.

9920624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993 (or 987 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 9920624 is about 3149.7022081460. The cubic root of 9920624 is about 214.8719193878.

The spelling of 9920624 in words is "nine million, nine hundred twenty thousand, six hundred twenty-four".