312990 has 16 divisors (see below), whose sum is σ = 751248. Its totient is φ = 83456.

The previous prime is 312989. The next prime is 313003. The reversal of 312990 is 99213.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 312990.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5187 + ... + 5246.

It is an arithmetic number, because the mean of its divisors is an integer number (46953).

2³¹²⁹⁹⁰ is an apocalyptic number.

312990 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

312990 is an abundant number, since it is smaller than the sum of its proper divisors (438258).

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

312990 is a wasteful number, since it uses less digits than its factorization.

312990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10443.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 312990 is about 559.4550920315. The cubic root of 312990 is about 67.8958902830.

The spelling of 312990 in words is "three hundred twelve thousand, nine hundred ninety".