3115728 has 120 divisors (see below), whose sum is σ = 10910016. Its totient is φ = 806400.

The previous prime is 3115727. The next prime is 3115729. The reversal of 3115728 is 8275113.

3115728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3115727) and next prime (3115729).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3115727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10948 + ... + 11228.

Almost surely, 2^3115728 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 3115728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5455008).

3115728 is an abundant number, since it is smaller than the sum of its proper divisors (7794288).

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

3115728 is a wasteful number, since it uses less digits than its factorization.

3115728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313 (or 304 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 3115728 is about 1765.1424871664. The cubic root of 3115728 is about 146.0561490419.

The spelling of 3115728 in words is "three million, one hundred fifteen thousand, seven hundred twenty-eight".