331432444 has 24 divisors (see below), whose sum is σ = 664015968. Its totient is φ = 141795840.

The previous prime is 331432427. The next prime is 331432463. The reversal of 331432444 is 444234133.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6624 + ... + 26584.

It is an arithmetic number, because the mean of its divisors is an integer number (27667332).

Almost surely, 2^331432444 is an apocalyptic number.

It is an amenable number.

331432444 is an abundant number, since it is smaller than the sum of its proper divisors (332583524).

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

331432444 is a wasteful number, since it uses less digits than its factorization.

331432444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20565 (or 20563 counting only the distinct ones).

The product of its digits is 13824, while the sum is 28.

The square root of 331432444 is about 18205.2861554000. The cubic root of 331432444 is about 692.0407579544.

Adding to 331432444 its reverse (444234133), we get a palindrome (775666577).

The spelling of 331432444 in words is "three hundred thirty-one million, four hundred thirty-two thousand, four hundred forty-four".