990290 has 48 divisors (see below), whose sum is σ = 2166912. Its totient is φ = 324576.

The previous prime is 990289. The next prime is 990293. The reversal of 990290 is 92099.

990290 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 990290.

It is not an unprimeable number, because it can be changed into a prime (990293) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21047 + ... + 21093.

It is an arithmetic number, because the mean of its divisors is an integer number (45144).

2⁹⁹⁰²⁹⁰ is an apocalyptic number.

990290 is an abundant number, since it is smaller than the sum of its proper divisors (1176622).

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

990290 is a wasteful number, since it uses less digits than its factorization.

990290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 990290 is about 995.1331569192. The cubic root of 990290 is about 99.6752800442.

The spelling of 990290 in words is "nine hundred ninety thousand, two hundred ninety".