2644506 has 12 divisors (see below), whose sum is σ = 5729802. Its totient is φ = 881496.

The previous prime is 2644489. The next prime is 2644507. The reversal of 2644506 is 6054462.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2295225 + 349281 = 1515^2 + 591^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2644506.

It is not an unprimeable number, because it can be changed into a prime (2644507) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73441 + ... + 73476.

2^2644506 is an apocalyptic number.

2644506 is an abundant number, since it is smaller than the sum of its proper divisors (3085296).

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

2644506 is a wasteful number, since it uses less digits than its factorization.

2644506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146925 (or 146922 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 2644506 is about 1626.1937153980. The cubic root of 2644506 is about 138.2870521457.

Adding to 2644506 its reverse (6054462), we get a palindrome (8698968).

The spelling of 2644506 in words is "two million, six hundred forty-four thousand, five hundred six".