331404332 has 48 divisors (see below), whose sum is σ = 706406400. Its totient is φ = 132952512.

The previous prime is 331404329. The next prime is 331404343. The reversal of 331404332 is 233404133.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 331404298 and 331404307.

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, 24794 + ... + 35742.

It is an arithmetic number, because the mean of its divisors is an integer number (14716800).

Almost surely, 2^331404332 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 331404332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (353203200).

331404332 is an abundant number, since it is smaller than the sum of its proper divisors (375002068).

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

331404332 is a wasteful number, since it uses less digits than its factorization.

331404332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11030 (or 11028 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 23.

The square root of 331404332 is about 18204.5140555852. The cubic root of 331404332 is about 692.0211911717.

Adding to 331404332 its reverse (233404133), we get a palindrome (564808465).

The spelling of 331404332 in words is "three hundred thirty-one million, four hundred four thousand, three hundred thirty-two".