3105128 has 32 divisors (see below), whose sum is σ = 6371400. Its totient is φ = 1410048.

The previous prime is 3105119. The next prime is 3105131. The reversal of 3105128 is 8215013.

3105128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2815684 + 289444 = 1678^2 + 538^2 .

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 7 ways as a sum of consecutive naturals, for example, 7388 + ... + 7796.

Almost surely, 2^3105128 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 3105128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3185700).

3105128 is an abundant number, since it is smaller than the sum of its proper divisors (3266272).

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

3105128 is a wasteful number, since it uses less digits than its factorization.

3105128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501 (or 497 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 3105128 is about 1762.1373385749. The cubic root of 3105128 is about 145.8903285972.

The spelling of 3105128 in words is "three million, one hundred five thousand, one hundred twenty-eight".