12678890 has 32 divisors (see below), whose sum is σ = 27457920. Its totient is φ = 4117824.

The previous prime is 12678863. The next prime is 12678893. The reversal of 12678890 is 9887621.

It is not an unprimeable number, because it can be changed into a prime (12678893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3437 + ... + 6096.

It is an arithmetic number, because the mean of its divisors is an integer number (858060).

Almost surely, 2^12678890 is an apocalyptic number.

12678890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12678890 is an abundant number, since it is smaller than the sum of its proper divisors (14779030).

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

12678890 is a wasteful number, since it uses less digits than its factorization.

12678890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9566.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 12678890 is about 3560.7429000140. The cubic root of 12678890 is about 233.1813136772.

The spelling of 12678890 in words is "twelve million, six hundred seventy-eight thousand, eight hundred ninety".