13222404 has 72 divisors (see below), whose sum is σ = 37914240. Its totient is φ = 3851712.

The previous prime is 13222343. The next prime is 13222411. The reversal of 13222404 is 40422231.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8149 + ... + 9635.

Almost surely, 2^13222404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13222404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18957120).

13222404 is an abundant number, since it is smaller than the sum of its proper divisors (24691836).

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

13222404 is a wasteful number, since it uses less digits than its factorization.

13222404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1529 (or 1524 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 13222404 is about 3636.2623667717. The cubic root of 13222404 is about 236.4667817889.

Adding to 13222404 its reverse (40422231), we get a palindrome (53644635).

The spelling of 13222404 in words is "thirteen million, two hundred twenty-two thousand, four hundred four".