9945624 has 64 divisors (see below), whose sum is σ = 27095040. Its totient is φ = 3024000.

The previous prime is 9945619. The next prime is 9945631. The reversal of 9945624 is 4265499.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39499 + ... + 39749.

It is an arithmetic number, because the mean of its divisors is an integer number (423360).

Almost surely, 2^9945624 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 9945624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13547520).

9945624 is an abundant number, since it is smaller than the sum of its proper divisors (17149416).

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

9945624 is a wasteful number, since it uses less digits than its factorization.

9945624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400 (or 396 counting only the distinct ones).

The product of its digits is 77760, while the sum is 39.

The square root of 9945624 is about 3153.6683402032. The cubic root of 9945624 is about 215.0522605967.

The spelling of 9945624 in words is "nine million, nine hundred forty-five thousand, six hundred twenty-four".