990530 has 8 divisors (see below), whose sum is σ = 1782972. Its totient is φ = 396208.

The previous prime is 990529. The next prime is 990547. The reversal of 990530 is 35099.

990530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 808201 + 182329 = 899^2 + 427^2 .

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

It is a super-2 number, since 2×990530² = 1962299361800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 990530.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49517 + ... + 49536.

2⁹⁹⁰⁵³⁰ is an apocalyptic number.

990530 is a deficient number, since it is larger than the sum of its proper divisors (792442).

990530 is a wasteful number, since it uses less digits than its factorization.

990530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99060.

The product of its (nonzero) digits is 1215, while the sum is 26.

The square root of 990530 is about 995.2537364914. The cubic root of 990530 is about 99.6833316031.

The spelling of 990530 in words is "nine hundred ninety thousand, five hundred thirty".