1323309960 has 256 divisors, whose sum is σ = 5105779200. Its totient is φ = 302330880.

The previous prime is 1323309959. The next prime is 1323310007. The reversal of 1323309960 is 699033231.

It is a happy number.

It is a super-2 number, since 2×1323309960² = 3502298500470403200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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 63 ways as a sum of consecutive naturals, for example, 611280 + ... + 613440.

It is an arithmetic number, because the mean of its divisors is an integer number (19944450).

Almost surely, 2^1323309960 is an apocalyptic number.

1323309960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1323309960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2552889600).

1323309960 is an abundant number, since it is smaller than the sum of its proper divisors (3782469240).

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

1323309960 is an equidigital number, since it uses as much as digits as its factorization.

1323309960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2200 (or 2178 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 36.

The square root of 1323309960 is about 36377.3275543985. The cubic root of 1323309960 is about 1097.8774386177.

The spelling of 1323309960 in words is "one billion, three hundred twenty-three million, three hundred nine thousand, nine hundred sixty".