9900144 has 50 divisors (see below), whose sum is σ = 28657640. Its totient is φ = 3299616.

The previous prime is 9900139. The next prime is 9900161. The reversal of 9900144 is 4410099.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 6.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2524 + ... + 5115.

Almost surely, 2^9900144 is an apocalyptic number.

It is an amenable number.

9900144 is an abundant number, since it is smaller than the sum of its proper divisors (18757496).

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

9900144 is a wasteful number, since it uses less digits than its factorization.

9900144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7659 (or 7644 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 9900144 is about 3146.4494275294. The cubic root of 9900144 is about 214.7239579777.

The spelling of 9900144 in words is "nine million, nine hundred thousand, one hundred forty-four".