990339128 has 32 divisors (see below), whose sum is σ = 1959888000. Its totient is φ = 467843040.

The previous prime is 990339107. The next prime is 990339139. The reversal of 990339128 is 821933099.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49013 + ... + 66203.

It is an arithmetic number, because the mean of its divisors is an integer number (61246500).

Almost surely, 2^990339128 is an apocalyptic number.

It is an amenable number.

990339128 is a deficient number, since it is larger than the sum of its proper divisors (969548872).

990339128 is a wasteful number, since it uses less digits than its factorization.

990339128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17595 (or 17591 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 990339128 is about 31469.6540813527. The cubic root of 990339128 is about 996.7692830415.

The spelling of 990339128 in words is "nine hundred ninety million, three hundred thirty-nine thousand, one hundred twenty-eight".