12166440 has 128 divisors (see below), whose sum is σ = 42940800. Its totient is φ = 2718720.

The previous prime is 12166439. The next prime is 12166447. The reversal of 12166440 is 4466121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 12166440.

It is not an unprimeable number, because it can be changed into a prime (12166447) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 16806 + ... + 17514.

It is an arithmetic number, because the mean of its divisors is an integer number (335475).

Almost surely, 2^12166440 is an apocalyptic number.

12166440 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 12166440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21470400).

12166440 is an abundant number, since it is smaller than the sum of its proper divisors (30774360).

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

12166440 is a wasteful number, since it uses less digits than its factorization.

12166440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747 (or 743 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 12166440 is about 3488.0424309346. The cubic root of 12166440 is about 229.9964712754.

The spelling of 12166440 in words is "twelve million, one hundred sixty-six thousand, four hundred forty".