1223276320 has 96 divisors (see below), whose sum is σ = 3315610368. Its totient is φ = 417788928.

The previous prime is 1223276291. The next prime is 1223276357. The reversal of 1223276320 is 236723221.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 308269 + ... + 312211.

It is an arithmetic number, because the mean of its divisors is an integer number (34537608).

Almost surely, 2^1223276320 is an apocalyptic number.

1223276320 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 1223276320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1657805184).

1223276320 is an abundant number, since it is smaller than the sum of its proper divisors (2092334048).

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

1223276320 is a wasteful number, since it uses less digits than its factorization.

1223276320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4242 (or 4234 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 1223276320 is about 34975.3673318809. The cubic root of 1223276320 is about 1069.4853902973.

Adding to 1223276320 its reverse (236723221), we get a palindrome (1459999541).

The spelling of 1223276320 in words is "one billion, two hundred twenty-three million, two hundred seventy-six thousand, three hundred twenty".