1323043440 has 80 divisors (see below), whose sum is σ = 4142118816. Its totient is φ = 349312000.

The previous prime is 1323043369. The next prime is 1323043471. The reversal of 1323043440 is 443403231.

1323043440 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1323043440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3051 + ... + 51530.

Almost surely, 2^1323043440 is an apocalyptic number.

1323043440 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 1323043440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2071059408).

1323043440 is an abundant number, since it is smaller than the sum of its proper divisors (2819075376).

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

1323043440 is a wasteful number, since it uses less digits than its factorization.

1323043440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54698 (or 54692 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 1323043440 is about 36373.6640991803. The cubic root of 1323043440 is about 1097.8037280107.

Adding to 1323043440 its reverse (443403231), we get a palindrome (1766446671).

The spelling of 1323043440 in words is "one billion, three hundred twenty-three million, forty-three thousand, four hundred forty".