1223631264 has 24 divisors (see below), whose sum is σ = 3212032320. Its totient is φ = 407877056.

The previous prime is 1223631247. The next prime is 1223631289. The reversal of 1223631264 is 4621363221.

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

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, 6372984 + ... + 6373175.

It is an arithmetic number, because the mean of its divisors is an integer number (133834680).

Almost surely, 2^1223631264 is an apocalyptic number.

It is an amenable number.

1223631264 is an abundant number, since it is smaller than the sum of its proper divisors (1988401056).

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

1223631264 is a wasteful number, since it uses less digits than its factorization.

1223631264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12746172 (or 12746164 counting only the distinct ones).

The product of its digits is 10368, while the sum is 30.

The square root of 1223631264 is about 34980.4411635988. The cubic root of 1223631264 is about 1069.5888203800.

Adding to 1223631264 its reverse (4621363221), we get a palindrome (5844994485).

The spelling of 1223631264 in words is "one billion, two hundred twenty-three million, six hundred thirty-one thousand, two hundred sixty-four".