1223020320 has 48 divisors (see below), whose sum is σ = 3852515520. Its totient is φ = 326138624.

The previous prime is 1223020303. The next prime is 1223020361. The reversal of 1223020320 is 230203221.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1223020320.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1273500 + ... + 1274459.

It is an arithmetic number, because the mean of its divisors is an integer number (80260740).

Almost surely, 2^1223020320 is an apocalyptic number.

1223020320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223020320 is an abundant number, since it is smaller than the sum of its proper divisors (2629495200).

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

1223020320 is a wasteful number, since it uses less digits than its factorization.

1223020320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2547977 (or 2547969 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 1223020320 is about 34971.7074218575. The cubic root of 1223020320 is about 1069.4107799097.

Adding to 1223020320 its reverse (230203221), we get a palindrome (1453223541).

The spelling of 1223020320 in words is "one billion, two hundred twenty-three million, twenty thousand, three hundred twenty".