3198728 has 16 divisors (see below), whose sum is σ = 6459180. Its totient is φ = 1476288.

The previous prime is 3198721. The next prime is 3198731. The reversal of 3198728 is 8278913.

It can be written as a sum of positive squares in 2 ways, for example, as 3020644 + 178084 = 1738^2 + 422^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3198691 and 3198700.

It is not an unprimeable number, because it can be changed into a prime (3198721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15275 + ... + 15482.

Almost surely, 2^3198728 is an apocalyptic number.

It is an amenable number.

3198728 is an abundant number, since it is smaller than the sum of its proper divisors (3260452).

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

3198728 is a wasteful number, since it uses less digits than its factorization.

3198728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30776 (or 30772 counting only the distinct ones).

The product of its digits is 24192, while the sum is 38.

The square root of 3198728 is about 1788.4988118531. The cubic root of 3198728 is about 147.3417319910.

The spelling of 3198728 in words is "three million, one hundred ninety-eight thousand, seven hundred twenty-eight".