2564244 has 24 divisors (see below), whose sum is σ = 6648320. Its totient is φ = 854712.

The previous prime is 2564207. The next prime is 2564249. The reversal of 2564244 is 4424652.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11764 + ... + 11979.

2^2564244 is an apocalyptic number.

It is an amenable number.

2564244 is an abundant number, since it is smaller than the sum of its proper divisors (4084076).

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

2564244 is a wasteful number, since it uses less digits than its factorization.

2564244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23756 (or 23748 counting only the distinct ones).

The product of its digits is 7680, while the sum is 27.

The square root of 2564244 is about 1601.3257007867. The cubic root of 2564244 is about 136.8736291850.

Adding to 2564244 its reverse (4424652), we get a palindrome (6988896).

The spelling of 2564244 in words is "two million, five hundred sixty-four thousand, two hundred forty-four".