3115128 has 64 divisors (see below), whose sum is σ = 8294400. Its totient is φ = 973440.

The previous prime is 3115117. The next prime is 3115153. The reversal of 3115128 is 8215113.

3115128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 39393 + ... + 39471.

It is an arithmetic number, because the mean of its divisors is an integer number (129600).

Almost surely, 2^3115128 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 3115128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4147200).

3115128 is an abundant number, since it is smaller than the sum of its proper divisors (5179272).

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

3115128 is a wasteful number, since it uses less digits than its factorization.

3115128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172 (or 168 counting only the distinct ones).

The product of its digits is 240, while the sum is 21.

The square root of 3115128 is about 1764.9725210326. The cubic root of 3115128 is about 146.0467730293.

The spelling of 3115128 in words is "three million, one hundred fifteen thousand, one hundred twenty-eight".