12312878 has 16 divisors (see below), whose sum is σ = 19554480. Its totient is φ = 5804736.

The previous prime is 12312877. The next prime is 12312899. The reversal of 12312878 is 87821321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26 + ... + 4962.

It is an arithmetic number, because the mean of its divisors is an integer number (1222155).

Almost surely, 2^12312878 is an apocalyptic number.

12312878 is a deficient number, since it is larger than the sum of its proper divisors (7241602).

12312878 is a wasteful number, since it uses less digits than its factorization.

12312878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5011.

The product of its digits is 5376, while the sum is 32.

The square root of 12312878 is about 3508.9710742609. The cubic root of 12312878 is about 230.9155566740.

The spelling of 12312878 in words is "twelve million, three hundred twelve thousand, eight hundred seventy-eight".