12272286 has 32 divisors (see below), whose sum is σ = 27054720. Its totient is φ = 3687264.

The previous prime is 12272269. The next prime is 12272287. The reversal of 12272286 is 68227221.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12272287) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1525 + ... + 5183.

It is an arithmetic number, because the mean of its divisors is an integer number (845460).

Almost surely, 2^12272286 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12272286, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13527360).

12272286 is an abundant number, since it is smaller than the sum of its proper divisors (14782434).

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

12272286 is a wasteful number, since it uses less digits than its factorization.

12272286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3720.

The product of its digits is 5376, while the sum is 30.

The square root of 12272286 is about 3503.1822675961. The cubic root of 12272286 is about 230.6615233612.

The spelling of 12272286 in words is "twelve million, two hundred seventy-two thousand, two hundred eighty-six".