2931728 has 20 divisors (see below), whose sum is σ = 5741820. Its totient is φ = 1449984.

The previous prime is 2931713. The next prime is 2931739. The reversal of 2931728 is 8271392.

It can be written as a sum of positive squares in 2 ways, for example, as 1364224 + 1567504 = 1168^2 + 1252^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2931694 and 2931703.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 608 + ... + 2496.

It is an arithmetic number, because the mean of its divisors is an integer number (287091).

2^2931728 is an apocalyptic number.

It is an amenable number.

2931728 is a deficient number, since it is larger than the sum of its proper divisors (2810092).

2931728 is a wasteful number, since it uses less digits than its factorization.

2931728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1994 (or 1988 counting only the distinct ones).

The product of its digits is 6048, while the sum is 32.

The square root of 2931728 is about 1712.2289566527. The cubic root of 2931728 is about 143.1224927257.

The spelling of 2931728 in words is "two million, nine hundred thirty-one thousand, seven hundred twenty-eight".