990622 has 16 divisors (see below), whose sum is σ = 1584000. Its totient is φ = 463320.

The previous prime is 990599. The next prime is 990631. The reversal of 990622 is 226099.

It is a congruent number.

It is an unprimeable number.

990622 is an untouchable number, because it is not equal to the sum of proper divisors of any 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, 4879 + ... + 5077.

It is an arithmetic number, because the mean of its divisors is an integer number (99000).

2⁹⁹⁰⁶²² is an apocalyptic number.

990622 is a deficient number, since it is larger than the sum of its proper divisors (593378).

990622 is a wasteful number, since it uses less digits than its factorization.

990622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 990622 is about 995.2999547875. The cubic root of 990622 is about 99.6864176892.

The spelling of 990622 in words is "nine hundred ninety thousand, six hundred twenty-two".