331868 has 12 divisors (see below), whose sum is σ = 585480. Its totient is φ = 164592.

The previous prime is 331843. The next prime is 331871. The reversal of 331868 is 868133.

It is a super-2 number, since 2×331868² = 220272738848, 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 331868.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 398 + ... + 906.

It is an arithmetic number, because the mean of its divisors is an integer number (48790).

2³³¹⁸⁶⁸ is an apocalyptic number.

It is an amenable number.

331868 is a deficient number, since it is larger than the sum of its proper divisors (253612).

331868 is a wasteful number, since it uses less digits than its factorization.

331868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676 (or 674 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The square root of 331868 is about 576.0798555756. The cubic root of 331868 is about 69.2343776530.

The spelling of 331868 in words is "three hundred thirty-one thousand, eight hundred sixty-eight".