9999990044 has 48 divisors (see below), whose sum is σ = 20165139456. Its totient is φ = 4296499200.

The previous prime is 9999990017. The next prime is 9999990097. The reversal of 9999990044 is 4400999999.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is a zygodrome in base 10.

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, 26597 + ... + 143900.

It is an arithmetic number, because the mean of its divisors is an integer number (420107072).

Almost surely, 2^9999990044 is an apocalyptic number.

It is an amenable number.

9999990044 is an abundant number, since it is smaller than the sum of its proper divisors (10165149412).

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

9999990044 is a wasteful number, since it uses less digits than its factorization.

9999990044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170586 (or 170584 counting only the distinct ones).

The product of its (nonzero) digits is 8503056, while the sum is 62.

The square root of 9999990044 is about 99999.9502199876. The cubic root of 9999990044 is about 2154.4339750466.

The spelling of 9999990044 in words is "nine billion, nine hundred ninety-nine million, nine hundred ninety thousand, forty-four".