13720266 has 96 divisors (see below), whose sum is σ = 36516480. Its totient is φ = 3779136.

The previous prime is 13720247. The next prime is 13720271. The reversal of 13720266 is 66202731.

It is a happy number.

13720266 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×13720266² = 376491398221512, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 125820 + ... + 125928.

It is an arithmetic number, because the mean of its divisors is an integer number (380380).

Almost surely, 2^13720266 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13720266, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18258240).

13720266 is an abundant number, since it is smaller than the sum of its proper divisors (22796214).

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

13720266 is a wasteful number, since it uses less digits than its factorization.

13720266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170 (or 158 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 13720266 is about 3704.0877419413. The cubic root of 13720266 is about 239.3981796458.

Adding to 13720266 its reverse (66202731), we get a palindrome (79922997).

The spelling of 13720266 in words is "thirteen million, seven hundred twenty thousand, two hundred sixty-six".