990632 has 8 divisors (see below), whose sum is σ = 1857450. Its totient is φ = 495312.

The previous prime is 990631. The next prime is 990637. The reversal of 990632 is 236099.

It can be written as a sum of positive squares in only one way, i.e., 835396 + 155236 = 914^2 + 394^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 990595 and 990604.

It is not an unprimeable number, because it can be changed into a prime (990631) by changing a digit.

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 as a sum of consecutive naturals, namely, 61907 + ... + 61922.

2⁹⁹⁰⁶³² is an apocalyptic number.

It is an amenable number.

990632 is a deficient number, since it is larger than the sum of its proper divisors (866818).

990632 is a wasteful number, since it uses less digits than its factorization.

990632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123835 (or 123831 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 990632 is about 995.3049783860. The cubic root of 990632 is about 99.6867531218.

The spelling of 990632 in words is "nine hundred ninety thousand, six hundred thirty-two".