331746728 has 16 divisors (see below), whose sum is σ = 625843680. Its totient is φ = 164855088.

The previous prime is 331746683. The next prime is 331746739. The reversal of 331746728 is 827647133.

It is a super-2 number, since 2×331746728² = 220111783077411968, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125900 + ... + 128507.

It is an arithmetic number, because the mean of its divisors is an integer number (39115230).

Almost surely, 2^331746728 is an apocalyptic number.

It is an amenable number.

331746728 is a deficient number, since it is larger than the sum of its proper divisors (294096952).

331746728 is a wasteful number, since it uses less digits than its factorization.

331746728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254576 (or 254572 counting only the distinct ones).

The product of its digits is 169344, while the sum is 41.

The square root of 331746728 is about 18213.9157788763. The cubic root of 331746728 is about 692.2594336149.

The spelling of 331746728 in words is "three hundred thirty-one million, seven hundred forty-six thousand, seven hundred twenty-eight".