3165728 has 12 divisors (see below), whose sum is σ = 6232590. Its totient is φ = 1582848.

The previous prime is 3165713. The next prime is 3165739. The reversal of 3165728 is 8275613.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 3055504 + 110224 = 1748^2 + 332^2 .

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 98929 = 3165728 / (3 + 1 + 6 + 5 + 7 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 3165694 and 3165703.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49433 + ... + 49496.

Almost surely, 2^3165728 is an apocalyptic number.

It is an amenable number.

3165728 is a deficient number, since it is larger than the sum of its proper divisors (3066862).

3165728 is an equidigital number, since it uses as much as digits as its factorization.

3165728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98939 (or 98931 counting only the distinct ones).

The product of its digits is 10080, while the sum is 32.

The square root of 3165728 is about 1779.2492798931. The cubic root of 3165728 is about 146.8332908879.

The spelling of 3165728 in words is "three million, one hundred sixty-five thousand, seven hundred twenty-eight".