9990100044 has 72 divisors (see below), whose sum is σ = 25868482640. Its totient is φ = 3249009792.

The previous prime is 9990100013. The next prime is 9990100051. The reversal of 9990100044 is 4400010999.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 9990099981 and 9990100008.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1651794 + ... + 1657830.

Almost surely, 2^9990100044 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 9990100044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12934241320).

9990100044 is an abundant number, since it is smaller than the sum of its proper divisors (15878382596).

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

9990100044 is a wasteful number, since it uses less digits than its factorization.

9990100044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7159 (or 7154 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 9990100044 is about 99950.4879627909. The cubic root of 9990100044 is about 2153.7234949990.

The spelling of 9990100044 in words is "nine billion, nine hundred ninety million, one hundred thousand, forty-four".