331401240 has 64 divisors (see below), whose sum is σ = 1104674400. Its totient is φ = 88373376.

The previous prime is 331401223. The next prime is 331401251. The reversal of 331401240 is 42104133.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 152347 + ... + 154506.

Almost surely, 2^331401240 is an apocalyptic number.

331401240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

331401240 is an abundant number, since it is smaller than the sum of its proper divisors (773273160).

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

331401240 is a wasteful number, since it uses less digits than its factorization.

331401240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306873 (or 306863 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 331401240 is about 18204.4291313955. The cubic root of 331401240 is about 692.0190389808.

Adding to 331401240 its reverse (42104133), we get a palindrome (373505373).

The spelling of 331401240 in words is "three hundred thirty-one million, four hundred one thousand, two hundred forty".