12386840 has 16 divisors (see below), whose sum is σ = 27870480. Its totient is φ = 4954720.

The previous prime is 12386833. The next prime is 12386849. The reversal of 12386840 is 4868321.

It is a junction number, because it is equal to n+sod(n) for n = 12386797 and 12386806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12386849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154796 + ... + 154875.

It is an arithmetic number, because the mean of its divisors is an integer number (1741905).

Almost surely, 2^12386840 is an apocalyptic number.

12386840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12386840 is an abundant number, since it is smaller than the sum of its proper divisors (15483640).

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

12386840 is a wasteful number, since it uses less digits than its factorization.

12386840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309682 (or 309678 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 12386840 is about 3519.4942818536. The cubic root of 12386840 is about 231.3769947699.

The spelling of 12386840 in words is "twelve million, three hundred eighty-six thousand, eight hundred forty".