13723866 has 48 divisors (see below), whose sum is σ = 32288256. Its totient is φ = 4187808.

The previous prime is 13723819. The next prime is 13723867. The reversal of 13723866 is 66832731.

It is a happy number.

13723866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Its product of digits (36288) is a multiple of the sum of its prime divisors (504).

It is a self number, because there is not a number n which added to its sum of digits gives 13723866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13723867) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52051 + ... + 52313.

It is an arithmetic number, because the mean of its divisors is an integer number (672672).

Almost surely, 2^13723866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13723866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16144128).

13723866 is an abundant number, since it is smaller than the sum of its proper divisors (18564390).

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

13723866 is a wasteful number, since it uses less digits than its factorization.

13723866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507 (or 504 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 13723866 is about 3704.5736596807. The cubic root of 13723866 is about 239.4191160252.

The spelling of 13723866 in words is "thirteen million, seven hundred twenty-three thousand, eight hundred sixty-six".