331740 has 72 divisors (see below), whose sum is σ = 1070160. Its totient is φ = 82944.

The previous prime is 331739. The next prime is 331753. The reversal of 331740 is 47133.

331740 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×331740² = 220102855200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 331740.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3372 + ... + 3468.

2³³¹⁷⁴⁰ is an apocalyptic number.

331740 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 331740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (535080).

331740 is an abundant number, since it is smaller than the sum of its proper divisors (738420).

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

331740 is a wasteful number, since it uses less digits than its factorization.

331740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131 (or 126 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 331740 is about 575.9687491522. The cubic root of 331740 is about 69.2254753787.

Adding to 331740 its reverse (47133), we get a palindrome (378873).

The spelling of 331740 in words is "three hundred thirty-one thousand, seven hundred forty".