12307678 has 4 divisors (see below), whose sum is σ = 18461520. Its totient is φ = 6153838.

The previous prime is 12307661. The next prime is 12307679. The reversal of 12307678 is 87670321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87670321 = 53 ⋅1654157.

It is an alternating number because its digits alternate between odd and even.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12307679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3076918 + ... + 3076921.

It is an arithmetic number, because the mean of its divisors is an integer number (4615380).

Almost surely, 2^12307678 is an apocalyptic number.

12307678 is a deficient number, since it is larger than the sum of its proper divisors (6153842).

12307678 is an equidigital number, since it uses as much as digits as its factorization.

12307678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6153841.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 12307678 is about 3508.2300380676. The cubic root of 12307678 is about 230.8830451856.

Adding to 12307678 its reverse (87670321), we get a palindrome (99977999).

The spelling of 12307678 in words is "twelve million, three hundred seven thousand, six hundred seventy-eight".