12366840 has 64 divisors (see below), whose sum is σ = 37337760. Its totient is φ = 3276800.

The previous prime is 12366839. The next prime is 12366859. The reversal of 12366840 is 4866321.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 12366798 and 12366807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30640 + ... + 31040.

Almost surely, 2^12366840 is an apocalyptic number.

12366840 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 12366840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18668880).

12366840 is an abundant number, since it is smaller than the sum of its proper divisors (24970920).

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

12366840 is a wasteful number, since it uses less digits than its factorization.

12366840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672 (or 668 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 12366840 is about 3516.6518167143. The cubic root of 12366840 is about 231.2523992933.

The spelling of 12366840 in words is "twelve million, three hundred sixty-six thousand, eight hundred forty".