3331728 has 60 divisors (see below), whose sum is σ = 9879948. Its totient is φ = 1044480.

The previous prime is 3331673. The next prime is 3331733. The reversal of 3331728 is 8271333.

It can be written as a sum of positive squares in 2 ways, for example, as 1557504 + 1774224 = 1248^2 + 1332^2 .

It is a super-2 number, since 2×3331728² = 22200822931968, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1768 + ... + 3128.

Almost surely, 2^3331728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3331728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4939974).

3331728 is an abundant number, since it is smaller than the sum of its proper divisors (6548220).

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

3331728 is a wasteful number, since it uses less digits than its factorization.

3331728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1392 (or 1383 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 3331728 is about 1825.3021667658. The cubic root of 3331728 is about 149.3561738731.

The spelling of 3331728 in words is "three million, three hundred thirty-one thousand, seven hundred twenty-eight".