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12280 = 235307
BaseRepresentation
bin10111111111000
3121211211
42333320
5343110
6132504
750542
oct27770
917754
1012280
119254
127134
135788
144692
15398a
hex2ff8

12280 has 16 divisors (see below), whose sum is σ = 27720. Its totient is φ = 4896.

The previous prime is 12277. The next prime is 12281. The reversal of 12280 is 8221.

12280 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

12280 is strictly pandigital in base 6.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 12280.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12281) 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, 114 + ... + 193.

212280 is an apocalyptic number.

12280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12280 is an abundant number, since it is smaller than the sum of its proper divisors (15440).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13860).

12280 is a wasteful number, since it uses less digits than its factorization.

12280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318 (or 314 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 12280 is about 110.8151614176. The cubic root of 12280 is about 23.0709842268.

It can be divided in two parts, 122 and 80, that added together give a palindrome (202).

The spelling of 12280 in words is "twelve thousand, two hundred eighty".

Divisors: 1 2 4 5 8 10 20 40 307 614 1228 1535 2456 3070 6140 12280