3109640 has 48 divisors (see below), whose sum is σ = 7460100. Its totient is φ = 1166336.

The previous prime is 3109637. The next prime is 3109649. The reversal of 3109640 is 469013.

3109640 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 6 ways, for example, as 1435204 + 1674436 = 1198^2 + 1294^2 .

It is not an unprimeable number, because it can be changed into a prime (3109649) 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 11 ways as a sum of consecutive naturals, for example, 11426 + ... + 11694.

Almost surely, 2^3109640 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 3109640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3730050).

3109640 is an abundant number, since it is smaller than the sum of its proper divisors (4350460).

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

3109640 is a wasteful number, since it uses less digits than its factorization.

3109640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314 (or 293 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 3109640 is about 1763.4171372650. The cubic root of 3109640 is about 145.9609578473.

The spelling of 3109640 in words is "three million, one hundred nine thousand, six hundred forty".