2644224 has 72 divisors (see below), whose sum is σ = 7701792. Its totient is φ = 798720.

The previous prime is 2644219. The next prime is 2644247. The reversal of 2644224 is 4224462.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a d-powerful number, because it can be written as 2⁷ + 6⁷ + 4⁴ + 4⁶ + 2⁹ + 2²¹ + 4⁹ .

It is a junction number, because it is equal to n+sod(n) for n = 2644194 and 2644203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8292 + ... + 8604.

2^2644224 is an apocalyptic number.

2644224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2644224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3850896).

2644224 is an abundant number, since it is smaller than the sum of its proper divisors (5057568).

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

2644224 is a wasteful number, since it uses less digits than its factorization.

2644224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343 (or 329 counting only the distinct ones).

The product of its digits is 3072, while the sum is 24.

The square root of 2644224 is about 1626.1070075490. The cubic root of 2644224 is about 138.2821365036.

Adding to 2644224 its reverse (4224462), we get a palindrome (6868686).

It can be divided in two parts, 264 and 4224, that multiplied together give a square (1115136 = 1056²).

The spelling of 2644224 in words is "two million, six hundred forty-four thousand, two hundred twenty-four".