1222512768 has 96 divisors (see below), whose sum is σ = 3552407040. Its totient is φ = 403508736.

The previous prime is 1222512751. The next prime is 1222512769. The reversal of 1222512768 is 8672152221.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1222512769) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113505 + ... + 123807.

It is an arithmetic number, because the mean of its divisors is an integer number (37004240).

Almost surely, 2^1222512768 is an apocalyptic number.

1222512768 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222512768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1776203520).

1222512768 is an abundant number, since it is smaller than the sum of its proper divisors (2329894272).

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

1222512768 is a wasteful number, since it uses less digits than its factorization.

1222512768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10426 (or 10411 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 1222512768 is about 34964.4500600253. The cubic root of 1222512768 is about 1069.2628247004.

Adding to 1222512768 its reverse (8672152221), we get a palindrome (9894664989).

The spelling of 1222512768 in words is "one billion, two hundred twenty-two million, five hundred twelve thousand, seven hundred sixty-eight".