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12638 = 27189
BaseRepresentation
bin11000101011110
3122100002
43011132
5401023
6134302
751563
oct30536
918302
1012638
11954a
127392
1359a2
14486a
153b28
hex315e

12638 has 8 divisors (see below), whose sum is σ = 19440. Its totient is φ = 6160.

The previous prime is 12637. The next prime is 12641. The reversal of 12638 is 83621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98 + ... + 186.

It is an arithmetic number, because the mean of its divisors is an integer number (2430).

212638 is an apocalyptic number.

12638 is a deficient number, since it is larger than the sum of its proper divisors (6802).

12638 is an equidigital number, since it uses as much as digits as its factorization.

12638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162.

The product of its digits is 288, while the sum is 20.

The square root of 12638 is about 112.4188596277. The cubic root of 12638 is about 23.2930370249.

The spelling of 12638 in words is "twelve thousand, six hundred thirty-eight".

Divisors: 1 2 71 89 142 178 6319 12638