2644623000 has 256 divisors, whose sum is σ = 9395568000. Its totient is φ = 687744000.

The previous prime is 2644622983. The next prime is 2644623001. The reversal of 2644623000 is 3264462.

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 (2644623001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1105806 + ... + 1108194.

Almost surely, 2^2644623000 is an apocalyptic number.

2644623000 is a gapful number since it is divisible by the number (20) 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 2644623000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4697784000).

2644623000 is an abundant number, since it is smaller than the sum of its proper divisors (6750945000).

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

2644623000 is a wasteful number, since it uses less digits than its factorization.

2644623000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2460 (or 2440 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 2644623000 is about 51425.8981448064. The cubic root of 2644623000 is about 1382.8909151166.

Adding to 2644623000 its reverse (3264462), we get a palindrome (2647887462).

It can be divided in two parts, 264 and 4623000, that added together give a palindrome (4623264).

The spelling of 2644623000 in words is "two billion, six hundred forty-four million, six hundred twenty-three thousand".