990650 has 12 divisors (see below), whose sum is σ = 1842702. Its totient is φ = 396240.

The previous prime is 990643. The next prime is 990673. The reversal of 990650 is 56099.

It can be written as a sum of positive squares in 3 ways, for example, as 380689 + 609961 = 617^2 + 781^2 .

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 990650.

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 5 ways as a sum of consecutive naturals, for example, 9857 + ... + 9956.

2⁹⁹⁰⁶⁵⁰ is an apocalyptic number.

990650 is a deficient number, since it is larger than the sum of its proper divisors (852052).

990650 is a wasteful number, since it uses less digits than its factorization.

990650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19825 (or 19820 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 990650 is about 995.3140207995. The cubic root of 990650 is about 99.6873568949.

The spelling of 990650 in words is "nine hundred ninety thousand, six hundred fifty".