990415944 has 64 divisors (see below), whose sum is σ = 3144182400. Its totient is φ = 282975552.

The previous prime is 990415901. The next prime is 990415957. The reversal of 990415944 is 449514099.

It is a super-2 number, since 2×990415944² = 1961847484258822272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 990415944.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 326007 + ... + 329030.

It is an arithmetic number, because the mean of its divisors is an integer number (49127850).

Almost surely, 2^990415944 is an apocalyptic number.

It is an amenable number.

990415944 is an abundant number, since it is smaller than the sum of its proper divisors (2153766456).

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

990415944 is a wasteful number, since it uses less digits than its factorization.

990415944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655059 (or 655049 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 990415944 is about 31470.8745350364. The cubic root of 990415944 is about 996.7950539609.

The spelling of 990415944 in words is "nine hundred ninety million, four hundred fifteen thousand, nine hundred forty-four".