331441728 has 28 divisors (see below), whose sum is σ = 876940080. Its totient is φ = 110480512.

The previous prime is 331441723. The next prime is 331441729. The reversal of 331441728 is 827144133.

It is not an unprimeable number, because it can be changed into a prime (331441723) 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, 862938 + ... + 863321.

Almost surely, 2^331441728 is an apocalyptic number.

It is an amenable number.

331441728 is an abundant number, since it is smaller than the sum of its proper divisors (545498352).

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

331441728 is a wasteful number, since it uses less digits than its factorization.

331441728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1726274 (or 1726264 counting only the distinct ones).

The product of its digits is 16128, while the sum is 33.

The square root of 331441728 is about 18205.5411345008. The cubic root of 331441728 is about 692.0472196497.

The spelling of 331441728 in words is "three hundred thirty-one million, four hundred forty-one thousand, seven hundred twenty-eight".