3071728 has 40 divisors (see below), whose sum is σ = 6713856. Its totient is φ = 1348800.

The previous prime is 3071723. The next prime is 3071741. The reversal of 3071728 is 8271703.

It is a happy number.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 3071696 and 3071705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3071723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5175 + ... + 5737.

Almost surely, 2^3071728 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 3071728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3356928).

3071728 is an abundant number, since it is smaller than the sum of its proper divisors (3642128).

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

3071728 is a wasteful number, since it uses less digits than its factorization.

3071728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613 (or 607 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 3071728 is about 1752.6345882699. The cubic root of 3071728 is about 145.3653568763.

The spelling of 3071728 in words is "three million, seventy-one thousand, seven hundred twenty-eight".