9990440 has 32 divisors (see below), whose sum is σ = 22572000. Its totient is φ = 3979584.

The previous prime is 9990403. The next prime is 9990457. The reversal of 9990440 is 440999.

It is a self number, because there is not a number n which added to its sum of digits gives 9990440.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14831 + ... + 15489.

It is an arithmetic number, because the mean of its divisors is an integer number (705375).

Almost surely, 2^9990440 is an apocalyptic number.

It is an amenable number.

9990440 is an abundant number, since it is smaller than the sum of its proper divisors (12581560).

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

9990440 is a wasteful number, since it uses less digits than its factorization.

9990440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049 (or 1045 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 9990440 is about 3160.7657300091. The cubic root of 9990440 is about 215.3747924615.

The spelling of 9990440 in words is "nine million, nine hundred ninety thousand, four hundred forty".