1223320240 has 20 divisors (see below), whose sum is σ = 2844219744. Its totient is φ = 489328064.

The previous prime is 1223320229. The next prime is 1223320249. The reversal of 1223320240 is 420233221.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (1223320249) 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 3 ways as a sum of consecutive naturals, for example, 7645672 + ... + 7645831.

Almost surely, 2^1223320240 is an apocalyptic number.

1223320240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223320240 is an abundant number, since it is smaller than the sum of its proper divisors (1620899504).

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

1223320240 is a wasteful number, since it uses less digits than its factorization.

1223320240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15291516 (or 15291510 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 1223320240 is about 34975.9951967060. The cubic root of 1223320240 is about 1069.4981895957.

Adding to 1223320240 its reverse (420233221), we get a palindrome (1643553461).

The spelling of 1223320240 in words is "one billion, two hundred twenty-three million, three hundred twenty thousand, two hundred forty".