1222717638 has 8 divisors (see below), whose sum is σ = 2445435288. Its totient is φ = 407572544.

The previous prime is 1222717627. The next prime is 1222717669. The reversal of 1222717638 is 8367172221.

It is a sphenic number, since it is the product of 3 distinct primes.

1222717638 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1222717596 and 1222717605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101893131 + ... + 101893142.

It is an arithmetic number, because the mean of its divisors is an integer number (305679411).

Almost surely, 2^1222717638 is an apocalyptic number.

1222717638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1222717638 is a wasteful number, since it uses less digits than its factorization.

1222717638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203786278.

The product of its digits is 56448, while the sum is 39.

The square root of 1222717638 is about 34967.3796273041. The cubic root of 1222717638 is about 1069.3225507677.

Adding to 1222717638 its reverse (8367172221), we get a palindrome (9589889859).

The spelling of 1222717638 in words is "one billion, two hundred twenty-two million, seven hundred seventeen thousand, six hundred thirty-eight".