990320642 has 32 divisors (see below), whose sum is σ = 1549243584. Its totient is φ = 474419200.

The previous prime is 990320593. The next prime is 990320657. The reversal of 990320642 is 246023099.

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, 1544642 + ... + 1545282.

It is an arithmetic number, because the mean of its divisors is an integer number (48413862).

Almost surely, 2^990320642 is an apocalyptic number.

990320642 is a deficient number, since it is larger than the sum of its proper divisors (558922942).

990320642 is a wasteful number, since it uses less digits than its factorization.

990320642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 990320642 is about 31469.3603684600. The cubic root of 990320642 is about 996.7630809938.

The spelling of 990320642 in words is "nine hundred ninety million, three hundred twenty thousand, six hundred forty-two".