13620222 has 96 divisors (see below), whose sum is σ = 38098944. Its totient is φ = 3412800.

The previous prime is 13620199. The next prime is 13620223. The reversal of 13620222 is 22202631.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 13620195 and 13620204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13620223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42808 + ... + 43124.

It is an arithmetic number, because the mean of its divisors is an integer number (396864).

Almost surely, 2^13620222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13620222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19049472).

13620222 is an abundant number, since it is smaller than the sum of its proper divisors (24478722).

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

13620222 is a wasteful number, since it uses less digits than its factorization.

13620222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374 (or 371 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 13620222 is about 3690.5584943203. The cubic root of 13620222 is about 238.8148867431.

Adding to 13620222 its reverse (22202631), we get a palindrome (35822853).

The spelling of 13620222 in words is "thirteen million, six hundred twenty thousand, two hundred twenty-two".