13722236 has 12 divisors (see below), whose sum is σ = 26197080. Its totient is φ = 6237360.

The previous prime is 13722229. The next prime is 13722239. The reversal of 13722236 is 63222731.

13722236 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13722239) 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, 155891 + ... + 155978.

It is an arithmetic number, because the mean of its divisors is an integer number (2183090).

Almost surely, 2^13722236 is an apocalyptic number.

It is an amenable number.

13722236 is a deficient number, since it is larger than the sum of its proper divisors (12474844).

13722236 is a wasteful number, since it uses less digits than its factorization.

13722236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311884 (or 311882 counting only the distinct ones).

The product of its digits is 3024, while the sum is 26.

The square root of 13722236 is about 3704.3536548229. The cubic root of 13722236 is about 239.4096369515.

Adding to 13722236 its reverse (63222731), we get a palindrome (76944967).

The spelling of 13722236 in words is "thirteen million, seven hundred twenty-two thousand, two hundred thirty-six".