12644500 has 96 divisors (see below), whose sum is σ = 31973760. Its totient is φ = 4356000.

The previous prime is 12644483. The next prime is 12644561. The reversal of 12644500 is 544621.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 665491 + ... + 665509.

It is an arithmetic number, because the mean of its divisors is an integer number (333060).

Almost surely, 2^12644500 is an apocalyptic number.

12644500 is a gapful number since it is divisible by the number (10) 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 12644500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15986880).

12644500 is an abundant number, since it is smaller than the sum of its proper divisors (19329260).

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

12644500 is a wasteful number, since it uses less digits than its factorization.

12644500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71 (or 37 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 12644500 is about 3555.9105725538. The cubic root of 12644500 is about 232.9702971340.

The spelling of 12644500 in words is "twelve million, six hundred forty-four thousand, five hundred".