990318 has 64 divisors (see below), whose sum is σ = 2557440. Its totient is φ = 248832.

The previous prime is 990313. The next prime is 990323. The reversal of 990318 is 813099.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (990313) and next prime (990323).

It is a super-2 number, since 2×990318² = 1961459482248, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990313) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13530 + ... + 13602.

It is an arithmetic number, because the mean of its divisors is an integer number (39960).

2⁹⁹⁰³¹⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 990318, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1278720).

990318 is an abundant number, since it is smaller than the sum of its proper divisors (1567122).

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

990318 is a wasteful number, since it uses less digits than its factorization.

990318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 990318 is about 995.1472252888. The cubic root of 990318 is about 99.6762194597.

The spelling of 990318 in words is "nine hundred ninety thousand, three hundred eighteen".