1223844018 has 16 divisors (see below), whose sum is σ = 2448030816. Its totient is φ = 407890880.

The previous prime is 1223844001. The next prime is 1223844019. The reversal of 1223844018 is 8104483221.

It is a self number, because there is not a number n which added to its sum of digits gives 1223844018.

It is not an unprimeable number, because it can be changed into a prime (1223844019) 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, 78298 + ... + 92618.

It is an arithmetic number, because the mean of its divisors is an integer number (153001926).

Almost surely, 2^1223844018 is an apocalyptic number.

1223844018 is an abundant number, since it is smaller than the sum of its proper divisors (1224186798).

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

1223844018 is a wasteful number, since it uses less digits than its factorization.

1223844018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28569.

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 1223844018 is about 34983.4820736873. The cubic root of 1223844018 is about 1069.6508069493.

The spelling of 1223844018 in words is "one billion, two hundred twenty-three million, eight hundred forty-four thousand, eighteen".