3031728 has 60 divisors (see below), whose sum is σ = 9117720. Its totient is φ = 865536.

The previous prime is 3031727. The next prime is 3031753. The reversal of 3031728 is 8271303.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 3031698 and 3031707.

It is not an unprimeable number, because it can be changed into a prime (3031727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1708 + ... + 2996.

It is an arithmetic number, because the mean of its divisors is an integer number (151962).

Almost surely, 2^3031728 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 3031728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4558860).

3031728 is an abundant number, since it is smaller than the sum of its proper divisors (6085992).

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

3031728 is a wasteful number, since it uses less digits than its factorization.

3031728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1314 (or 1301 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 3031728 is about 1741.1858028367. The cubic root of 3031728 is about 144.7316161129.

The spelling of 3031728 in words is "three million, thirty-one thousand, seven hundred twenty-eight".