Adding to 331440 its reverse (44133), we get a palindrome (375573).
It is a tau number, because it is divible by the number of its divisors (40).
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 331440.
331440 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
2331440 is an apocalyptic number.
331440 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 pseudoperfect number, because it is the sum of a subset of its proper divisors.
331440 is a wasteful number, since it uses less digits than its factorization.
331440 is an evil number, because the sum of its binary digits is even.
The square root of 331440 is about 575.7082594509. The cubic root of 331440 is about 69.2046016965.
The spelling of 331440 in words is "three hundred thirty-one thousand, four hundred forty".