12286440 has 48 divisors (see below), whose sum is σ = 39932100. Its totient is φ = 3276288.

The previous prime is 12286423. The next prime is 12286441. The reversal of 12286440 is 4468221.

12286440 is a `hidden beast` number, since 12 + 2 + 8 + 644 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 11329956 + 956484 = 3366^2 + 978^2 .

It is not an unprimeable number, because it can be changed into a prime (12286441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16705 + ... + 17424.

Almost surely, 2^12286440 is an apocalyptic number.

12286440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12286440 is an abundant number, since it is smaller than the sum of its proper divisors (27645660).

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

12286440 is a wasteful number, since it uses less digits than its factorization.

12286440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34146 (or 34139 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 12286440 is about 3505.2018486815. The cubic root of 12286440 is about 230.7501656044.

The spelling of 12286440 in words is "twelve million, two hundred eighty-six thousand, four hundred forty".