1222004320 has 96 divisors (see below), whose sum is σ = 3002469120. Its totient is φ = 469432320.

The previous prime is 1222004309. The next prime is 1222004321. The reversal of 1222004320 is 234002221.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 1222004294 and 1222004303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222004321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1034130 + ... + 1035310.

It is an arithmetic number, because the mean of its divisors is an integer number (31275720).

Almost surely, 2^1222004320 is an apocalyptic number.

1222004320 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 1222004320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1501234560).

1222004320 is an abundant number, since it is smaller than the sum of its proper divisors (1780464800).

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

1222004320 is a wasteful number, since it uses less digits than its factorization.

1222004320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1448 (or 1440 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 1222004320 is about 34957.1783758358. The cubic root of 1222004320 is about 1069.1145672351.

Adding to 1222004320 its reverse (234002221), we get a palindrome (1456006541).

The spelling of 1222004320 in words is "one billion, two hundred twenty-two million, four thousand, three hundred twenty".