1222976256 has 72 divisors (see below), whose sum is σ = 3270759744. Its totient is φ = 405672960.

The previous prime is 1222976203. The next prime is 1222976267. The reversal of 1222976256 is 6526792221.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158275 + ... + 165821.

Almost surely, 2^1222976256 is an apocalyptic number.

1222976256 is a gapful number since it is divisible by the number (16) 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 1222976256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1635379872).

1222976256 is an abundant number, since it is smaller than the sum of its proper divisors (2047783488).

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

1222976256 is an equidigital number, since it uses as much as digits as its factorization.

1222976256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7777 (or 7763 counting only the distinct ones).

The product of its digits is 181440, while the sum is 42.

The square root of 1222976256 is about 34971.0774212062. The cubic root of 1222976256 is about 1069.3979365465.

The spelling of 1222976256 in words is "one billion, two hundred twenty-two million, nine hundred seventy-six thousand, two hundred fifty-six".