1223913988 has 24 divisors (see below), whose sum is σ = 2390905440. Its totient is φ = 543385920.

The previous prime is 1223913983. The next prime is 1223914049. The reversal of 1223913988 is 8893193221.

It is not an unprimeable number, because it can be changed into a prime (1223913983) 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 7 ways as a sum of consecutive naturals, for example, 321553 + ... + 325336.

It is an arithmetic number, because the mean of its divisors is an integer number (99621060).

Almost surely, 2^1223913988 is an apocalyptic number.

It is an amenable number.

1223913988 is a deficient number, since it is larger than the sum of its proper divisors (1166991452).

1223913988 is a wasteful number, since it uses less digits than its factorization.

1223913988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646947 (or 646945 counting only the distinct ones).

The product of its digits is 186624, while the sum is 46.

The square root of 1223913988 is about 34984.4821027838. The cubic root of 1223913988 is about 1069.6711913664.

The spelling of 1223913988 in words is "one billion, two hundred twenty-three million, nine hundred thirteen thousand, nine hundred eighty-eight".