990534 has 8 divisors (see below), whose sum is σ = 1981080. Its totient is φ = 330176.

The previous prime is 990529. The next prime is 990547. The reversal of 990534 is 435099.

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

990534 is an admirable number.

It is a congruent number.

It is an unprimeable number.

990534 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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82539 + ... + 82550.

It is an arithmetic number, because the mean of its divisors is an integer number (247635).

2⁹⁹⁰⁵³⁴ is an apocalyptic number.

990534 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

990534 is a wasteful number, since it uses less digits than its factorization.

990534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165094.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 990534 is about 995.2557460271. The cubic root of 990534 is about 99.6834657847.

The spelling of 990534 in words is "nine hundred ninety thousand, five hundred thirty-four".