991082330 has 24 divisors (see below), whose sum is σ = 2075206068. Its totient is φ = 339799488.

The previous prime is 991082321. The next prime is 991082353. The reversal of 991082330 is 33280199.

It can be written as a sum of positive squares in 2 ways, for example, as 984767161 + 6315169 = 31381^2 + 2513^2 .

It is a Harshad number since it is a multiple of its sum of digits (35).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1010819 + ... + 1011798.

Almost surely, 2^991082330 is an apocalyptic number.

991082330 is an abundant number, since it is smaller than the sum of its proper divisors (1084123738).

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

991082330 is a wasteful number, since it uses less digits than its factorization.

991082330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2022638 (or 2022631 counting only the distinct ones).

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

The square root of 991082330 is about 31481.4600995570. The cubic root of 991082330 is about 997.0185632019.

The spelling of 991082330 in words is "nine hundred ninety-one million, eighty-two thousand, three hundred thirty".