990339831 has 48 divisors (see below), whose sum is σ = 1672473600. Its totient is φ = 577313568.

The previous prime is 990339809. The next prime is 990339859. The reversal of 990339831 is 138933099.

It is not a de Polignac number, because 990339831 - 2⁹ = 990339319 is a prime.

It is a super-2 number, since 2×990339831² = 1961545961730217122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990339881) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 80986 + ... + 92408.

It is an arithmetic number, because the mean of its divisors is an integer number (34843200).

Almost surely, 2^990339831 is an apocalyptic number.

990339831 is a deficient number, since it is larger than the sum of its proper divisors (682133769).

990339831 is a wasteful number, since it uses less digits than its factorization.

990339831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11477 (or 11458 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 45.

The square root of 990339831 is about 31469.6652508412. The cubic root of 990339831 is about 996.7695188963.

The spelling of 990339831 in words is "nine hundred ninety million, three hundred thirty-nine thousand, eight hundred thirty-one".