1223305320 has 64 divisors (see below), whose sum is σ = 3704253120. Its totient is φ = 323162624.

The previous prime is 1223305309. The next prime is 1223305327. The reversal of 1223305320 is 235033221.

It is not an unprimeable number, because it can be changed into a prime (1223305327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34797 + ... + 60476.

It is an arithmetic number, because the mean of its divisors is an integer number (57878955).

Almost surely, 2^1223305320 is an apocalyptic number.

1223305320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223305320 is an abundant number, since it is smaller than the sum of its proper divisors (2480947800).

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

1223305320 is a wasteful number, since it uses less digits than its factorization.

1223305320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95394 (or 95390 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 1223305320 is about 34975.7819069138. The cubic root of 1223305320 is about 1069.4938415988.

Adding to 1223305320 its reverse (235033221), we get a palindrome (1458338541).

The spelling of 1223305320 in words is "one billion, two hundred twenty-three million, three hundred five thousand, three hundred twenty".