331338 has 40 divisors (see below), whose sum is σ = 806688. Its totient is φ = 90552.

The previous prime is 331337. The next prime is 331339. The reversal of 331338 is 833133.

It is an interprime number because it is at equal distance from previous prime (331337) and next prime (331339).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331333) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 14395 + ... + 14417.

2³³¹³³⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 331338, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (403344).

331338 is an abundant number, since it is smaller than the sum of its proper divisors (475350).

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

331338 is an equidigital number, since it uses as much as digits as its factorization.

331338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56 (or 35 counting only the distinct ones).

The product of its digits is 648, while the sum is 21.

The square root of 331338 is about 575.6196660991. The cubic root of 331338 is about 69.1975017753.

The spelling of 331338 in words is "three hundred thirty-one thousand, three hundred thirty-eight".