1223320000 has 280 divisors, whose sum is σ = 3684995424. Its totient is φ = 393216000.

The previous prime is 1223319947. The next prime is 1223320003. The reversal of 1223320000 is 233221.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (280).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223320003) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4759872 + ... + 4760128.

Almost surely, 2^1223320000 is an apocalyptic number.

1223320000 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 1223320000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1842497712).

1223320000 is an abundant number, since it is smaller than the sum of its proper divisors (2461675424).

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

1223320000 is an equidigital number, since it uses as much as digits as its factorization.

1223320000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313 (or 288 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 1223320000 is about 34975.9917657813. The cubic root of 1223320000 is about 1069.4981196550.

Adding to 1223320000 its reverse (233221), we get a palindrome (1223553221).

The spelling of 1223320000 in words is "one billion, two hundred twenty-three million, three hundred twenty thousand".