2644530 has 64 divisors (see below), whose sum is σ = 7430400. Its totient is φ = 602112.

The previous prime is 2644513. The next prime is 2644531. The reversal of 2644530 is 354462.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2644530.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2644531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10162 + ... + 10418.

It is an arithmetic number, because the mean of its divisors is an integer number (116100).

2^2644530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2644530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3715200).

2644530 is an abundant number, since it is smaller than the sum of its proper divisors (4785870).

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

2644530 is a wasteful number, since it uses less digits than its factorization.

2644530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288 (or 274 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 2644530 is about 1626.2010945759. The cubic root of 2644530 is about 138.2874704821.

Adding to 2644530 its reverse (354462), we get a palindrome (2998992).

The spelling of 2644530 in words is "two million, six hundred forty-four thousand, five hundred thirty".