331404324240 has 80 divisors (see below), whose sum is σ = 1120749178176. Its totient is φ = 80340441600.

The previous prime is 331404324227. The next prime is 331404324257. The reversal of 331404324240 is 42423404133.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×331404324240² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 331404324198 and 331404324207.

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, 62763331 + ... + 62768610.

Almost surely, 2^331404324240 is an apocalyptic number.

331404324240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

331404324240 is an abundant number, since it is smaller than the sum of its proper divisors (789344853936).

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

331404324240 is a wasteful number, since it uses less digits than its factorization.

331404324240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125531968 (or 125531962 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 30.

Adding to 331404324240 its reverse (42423404133), we get a palindrome (373827728373).

The spelling of 331404324240 in words is "three hundred thirty-one billion, four hundred four million, three hundred twenty-four thousand, two hundred forty".