311992 has 16 divisors (see below), whose sum is σ = 595800. Its totient is φ = 153120.

The previous prime is 311981. The next prime is 312007. The reversal of 311992 is 299113.

It is a congruent number.

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, 142 + ... + 802.

2³¹¹⁹⁹² is an apocalyptic number.

It is an amenable number.

311992 is a deficient number, since it is larger than the sum of its proper divisors (283808).

311992 is a wasteful number, since it uses less digits than its factorization.

311992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726 (or 722 counting only the distinct ones).

The product of its digits is 486, while the sum is 25.

The square root of 311992 is about 558.5624405561. The cubic root of 311992 is about 67.8236491611.

The spelling of 311992 in words is "three hundred eleven thousand, nine hundred ninety-two".