12138080 has 48 divisors (see below), whose sum is σ = 28985040. Its totient is φ = 4803072.

The previous prime is 12138073. The next prime is 12138097. The reversal of 12138080 is 8083121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16766 + ... + 17474.

It is an arithmetic number, because the mean of its divisors is an integer number (603855).

Almost surely, 2^12138080 is an apocalyptic number.

12138080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12138080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14492520).

12138080 is an abundant number, since it is smaller than the sum of its proper divisors (16846960).

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

12138080 is a wasteful number, since it uses less digits than its factorization.

12138080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831 (or 823 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 12138080 is about 3483.9747415847. The cubic root of 12138080 is about 229.8176248026.

The spelling of 12138080 in words is "twelve million, one hundred thirty-eight thousand, eighty".