990634 has 8 divisors (see below), whose sum is σ = 1520640. Its totient is φ = 483756.

The previous prime is 990631. The next prime is 990637. The reversal of 990634 is 436099.

It is an interprime number because it is at equal distance from previous prime (990631) and next prime (990637).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 990596 and 990605.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5674 + ... + 5845.

It is an arithmetic number, because the mean of its divisors is an integer number (190080).

2⁹⁹⁰⁶³⁴ is an apocalyptic number.

990634 is a deficient number, since it is larger than the sum of its proper divisors (530006).

990634 is a wasteful number, since it uses less digits than its factorization.

990634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11564.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 990634 is about 995.3059831027. The cubic root of 990634 is about 99.6868202081.

The spelling of 990634 in words is "nine hundred ninety thousand, six hundred thirty-four".