12136878 has 96 divisors (see below), whose sum is σ = 31370976. Its totient is φ = 3483648.

The previous prime is 12136853. The next prime is 12136889. The reversal of 12136878 is 87863121.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 107350 + ... + 107462.

It is an arithmetic number, because the mean of its divisors is an integer number (326781).

Almost surely, 2^12136878 is an apocalyptic number.

12136878 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12136878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15685488).

12136878 is an abundant number, since it is smaller than the sum of its proper divisors (19234098).

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

12136878 is a wasteful number, since it uses less digits than its factorization.

12136878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160 (or 148 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 12136878 is about 3483.8022331929. The cubic root of 12136878 is about 229.8100384874.

Adding to 12136878 its reverse (87863121), we get a palindrome (99999999).

The spelling of 12136878 in words is "twelve million, one hundred thirty-six thousand, eight hundred seventy-eight".