1223319644 has 48 divisors (see below), whose sum is σ = 2307782400. Its totient is φ = 566092800.

The previous prime is 1223319637. The next prime is 1223319649. The reversal of 1223319644 is 4469133221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223319649) 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 15 ways as a sum of consecutive naturals, for example, 390404 + ... + 393524.

It is an arithmetic number, because the mean of its divisors is an integer number (48078800).

Almost surely, 2^1223319644 is an apocalyptic number.

It is an amenable number.

1223319644 is a deficient number, since it is larger than the sum of its proper divisors (1084462756).

1223319644 is a wasteful number, since it uses less digits than its factorization.

1223319644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3294 (or 3292 counting only the distinct ones).

The product of its digits is 31104, while the sum is 35.

The square root of 1223319644 is about 34975.9866765757. The cubic root of 1223319644 is about 1069.4980159097.

The spelling of 1223319644 in words is "one billion, two hundred twenty-three million, three hundred nineteen thousand, six hundred forty-four".