3197728 has 12 divisors (see below), whose sum is σ = 6295590. Its totient is φ = 1598848.

The previous prime is 3197723. The next prime is 3197767. The reversal of 3197728 is 8277913.

It can be written as a sum of positive squares in only one way, i.e., 3196944 + 784 = 1788^2 + 28^2 .

It is not an unprimeable number, because it can be changed into a prime (3197723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49933 + ... + 49996.

Almost surely, 2^3197728 is an apocalyptic number.

It is an amenable number.

3197728 is a deficient number, since it is larger than the sum of its proper divisors (3097862).

3197728 is an equidigital number, since it uses as much as digits as its factorization.

3197728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99939 (or 99931 counting only the distinct ones).

The product of its digits is 21168, while the sum is 37.

The square root of 3197728 is about 1788.2192259340. The cubic root of 3197728 is about 147.3263761903.

The spelling of 3197728 in words is "three million, one hundred ninety-seven thousand, seven hundred twenty-eight".