12340278 has 24 divisors (see below), whose sum is σ = 26978328. Its totient is φ = 4076352.

The previous prime is 12340271. The next prime is 12340309. The reversal of 12340278 is 87204321.

12340278 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12340278² = 304564922234568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12340271) 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, 1000 + ... + 5067.

It is an arithmetic number, because the mean of its divisors is an integer number (1124097).

Almost surely, 2^12340278 is an apocalyptic number.

12340278 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12340278 is an abundant number, since it is smaller than the sum of its proper divisors (14638050).

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

12340278 is a wasteful number, since it uses less digits than its factorization.

12340278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6188 (or 6185 counting only the distinct ones).

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

The square root of 12340278 is about 3512.8731830227. The cubic root of 12340278 is about 231.0867161922.

Adding to 12340278 its reverse (87204321), we get a palindrome (99544599).

It can be divided in two parts, 123 and 40278, that added together give a square (40401 = 201²).

The spelling of 12340278 in words is "twelve million, three hundred forty thousand, two hundred seventy-eight".