2723644 has 48 divisors (see below), whose sum is σ = 6128640. Its totient is φ = 1028160.

The previous prime is 2723641. The next prime is 2723687. The reversal of 2723644 is 4463272.

2723644 = T₄₂₇ + T₄₂₈ + ... + T₄₅₄.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2723641) 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, 11277 + ... + 11515.

It is an arithmetic number, because the mean of its divisors is an integer number (127680).

2^2723644 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 2723644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3064320).

2723644 is an abundant number, since it is smaller than the sum of its proper divisors (3404996).

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

2723644 is a wasteful number, since it uses less digits than its factorization.

2723644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298 (or 296 counting only the distinct ones).

The product of its digits is 8064, while the sum is 28.

The square root of 2723644 is about 1650.3466302568. The cubic root of 2723644 is about 139.6529499221.

It can be divided in two parts, 272 and 3644, that added together give a triangular number (3916 = T₈₈).

The spelling of 2723644 in words is "two million, seven hundred twenty-three thousand, six hundred forty-four".