1323245440 has 128 divisors (see below), whose sum is σ = 3487004640. Its totient is φ = 476160000.

The previous prime is 1323245431. The next prime is 1323245449. The reversal of 1323245440 is 445423231.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1323245431) and next prime (1323245449).

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 1323245399 and 1323245408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323245449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 710110 + ... + 711970.

Almost surely, 2^1323245440 is an apocalyptic number.

1323245440 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 1323245440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1743502320).

1323245440 is an abundant number, since it is smaller than the sum of its proper divisors (2163759200).

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

1323245440 is a wasteful number, since it uses less digits than its factorization.

1323245440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1992 (or 1980 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 1323245440 is about 36376.4407274818. The cubic root of 1323245440 is about 1097.8595954301.

Adding to 1323245440 its reverse (445423231), we get a palindrome (1768668671).

The spelling of 1323245440 in words is "one billion, three hundred twenty-three million, two hundred forty-five thousand, four hundred forty".