12278340 has 36 divisors (see below), whose sum is σ = 37244844. Its totient is φ = 3274176.

The previous prime is 12278333. The next prime is 12278377. The reversal of 12278340 is 4387221.

12278340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 4359744 + 7918596 = 2088^2 + 2814^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33927 + ... + 34286.

It is an arithmetic number, because the mean of its divisors is an integer number (1034579).

Almost surely, 2^12278340 is an apocalyptic number.

12278340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12278340 is an abundant number, since it is smaller than the sum of its proper divisors (24966504).

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

12278340 is a wasteful number, since it uses less digits than its factorization.

12278340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68228 (or 68223 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 12278340 is about 3504.0462325717. The cubic root of 12278340 is about 230.6994460787.

The spelling of 12278340 in words is "twelve million, two hundred seventy-eight thousand, three hundred forty".