1222456320 has 352 divisors, whose sum is σ = 4480473600. Its totient is φ = 315850752.

The previous prime is 1222456309. The next prime is 1222456337. The reversal of 1222456320 is 236542221.

It is a happy number.

1222456320 is a `hidden beast` number, since 1 + 2 + 2 + 24 + 5 + 632 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5114761 + ... + 5114999.

Almost surely, 2^1222456320 is an apocalyptic number.

1222456320 is a gapful number since it is divisible by the number (10) 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 1222456320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2240236800).

1222456320 is an abundant number, since it is smaller than the sum of its proper divisors (3258017280).

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

1222456320 is a wasteful number, since it uses less digits than its factorization.

1222456320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310 (or 286 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 1222456320 is about 34963.6428308035. The cubic root of 1222456320 is about 1069.2463671554.

Adding to 1222456320 its reverse (236542221), we get a palindrome (1458998541).

The spelling of 1222456320 in words is "one billion, two hundred twenty-two million, four hundred fifty-six thousand, three hundred twenty".