331423240 has 16 divisors (see below), whose sum is σ = 745702380. Its totient is φ = 132569280.

The previous prime is 331423229. The next prime is 331423241. The reversal of 331423240 is 42324133.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 331167204 + 256036 = 18198^2 + 506^2 .

It is not an unprimeable number, because it can be changed into a prime (331423241) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4142751 + ... + 4142830.

Almost surely, 2^331423240 is an apocalyptic number.

It is an amenable number.

331423240 is an abundant number, since it is smaller than the sum of its proper divisors (414279140).

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

331423240 is a wasteful number, since it uses less digits than its factorization.

331423240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8285592 (or 8285588 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 331423240 is about 18205.0333699227. The cubic root of 331423240 is about 692.0343518203.

Adding to 331423240 its reverse (42324133), we get a palindrome (373747373).

The spelling of 331423240 in words is "three hundred thirty-one million, four hundred twenty-three thousand, two hundred forty".