1222637528 has 16 divisors (see below), whose sum is σ = 2619937680. Its totient is φ = 523987488.

The previous prime is 1222637527. The next prime is 1222637543. The reversal of 1222637528 is 8257362221.

It is a junction number, because it is equal to n+sod(n) for n = 1222637491 and 1222637500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222637527) 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, 10916351 + ... + 10916462.

It is an arithmetic number, because the mean of its divisors is an integer number (163746105).

Almost surely, 2^1222637528 is an apocalyptic number.

It is an amenable number.

1222637528 is an abundant number, since it is smaller than the sum of its proper divisors (1397300152).

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

1222637528 is a wasteful number, since it uses less digits than its factorization.

1222637528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21832826 (or 21832822 counting only the distinct ones).

The product of its digits is 80640, while the sum is 38.

The square root of 1222637528 is about 34966.2341123547. The cubic root of 1222637528 is about 1069.2991969701.

Adding to 1222637528 its reverse (8257362221), we get a palindrome (9479999749).

The spelling of 1222637528 in words is "one billion, two hundred twenty-two million, six hundred thirty-seven thousand, five hundred twenty-eight".