1323964644 has 24 divisors (see below), whose sum is σ = 3107754048. Its totient is φ = 438678240.

The previous prime is 1323964643. The next prime is 1323964651. The reversal of 1323964644 is 4464693231.

It is a junction number, because it is equal to n+sod(n) for n = 1323964596 and 1323964605.

It is not an unprimeable number, because it can be changed into a prime (1323964643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 328327 + ... + 332334.

It is an arithmetic number, because the mean of its divisors is an integer number (129489752).

Almost surely, 2^1323964644 is an apocalyptic number.

It is an amenable number.

1323964644 is an abundant number, since it is smaller than the sum of its proper divisors (1783789404).

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

1323964644 is a wasteful number, since it uses less digits than its factorization.

1323964644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660835 (or 660833 counting only the distinct ones).

The product of its digits is 373248, while the sum is 42.

The square root of 1323964644 is about 36386.3249586984. The cubic root of 1323964644 is about 1098.0584605288.

The spelling of 1323964644 in words is "one billion, three hundred twenty-three million, nine hundred sixty-four thousand, six hundred forty-four".