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12644276 = 224576917
BaseRepresentation
bin110000001110…
…111110110100
3212210101200112
4300032332310
511214104101
61131002152
7212321531
oct60167664
925711615
1012644276
117156917
124299358
132809328
141971d88
15119b6bb
hexc0efb4

12644276 has 12 divisors (see below), whose sum is σ = 22179108. Its totient is φ = 6307392.

The previous prime is 12644267. The next prime is 12644293. The reversal of 12644276 is 67244621.

It can be written as a sum of positive squares in 2 ways, for example, as 9672100 + 2972176 = 3110^2 + 1724^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1631 + ... + 5286.

It is an arithmetic number, because the mean of its divisors is an integer number (1848259).

Almost surely, 212644276 is an apocalyptic number.

It is an amenable number.

12644276 is a deficient number, since it is larger than the sum of its proper divisors (9534832).

12644276 is a wasteful number, since it uses less digits than its factorization.

12644276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7378 (or 7376 counting only the distinct ones).

The product of its digits is 16128, while the sum is 32.

The square root of 12644276 is about 3555.8790755592. The cubic root of 12644276 is about 232.9689214198.

Adding to 12644276 its reverse (67244621), we get a palindrome (79888897).

The spelling of 12644276 in words is "twelve million, six hundred forty-four thousand, two hundred seventy-six".

Divisors: 1 2 4 457 914 1828 6917 13834 27668 3161069 6322138 12644276