2709644 has 48 divisors (see below), whose sum is σ = 5806080. Its totient is φ = 1081920.

The previous prime is 2709643. The next prime is 2709659. The reversal of 2709644 is 4469072.

2709644 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 2709644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2709643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38129 + ... + 38199.

It is an arithmetic number, because the mean of its divisors is an integer number (120960).

2^2709644 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 2709644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2903040).

2709644 is an abundant number, since it is smaller than the sum of its proper divisors (3096436).

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

2709644 is a wasteful number, since it uses less digits than its factorization.

2709644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 2709644 is about 1646.0996324646. The cubic root of 2709644 is about 139.4132586826.

The spelling of 2709644 in words is "two million, seven hundred nine thousand, six hundred forty-four".