331838 has 8 divisors (see below), whose sum is σ = 536088. Its totient is φ = 153144.

The previous prime is 331819. The next prime is 331841. The reversal of 331838 is 838133.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×331838² = 220232916488, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 12763 = 331838 / (3 + 3 + 1 + 8 + 3 + 8).

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, 6356 + ... + 6407.

It is an arithmetic number, because the mean of its divisors is an integer number (67011).

2³³¹⁸³⁸ is an apocalyptic number.

331838 is a deficient number, since it is larger than the sum of its proper divisors (204250).

331838 is a wasteful number, since it uses less digits than its factorization.

331838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12778.

The product of its digits is 1728, while the sum is 26.

The square root of 331838 is about 576.0538169303. The cubic root of 331838 is about 69.2322913879.

The spelling of 331838 in words is "three hundred thirty-one thousand, eight hundred thirty-eight".