1323404340 has 72 divisors (see below), whose sum is σ = 3910888800. Its totient is φ = 334328256.

The previous prime is 1323404293. The next prime is 1323404363. The reversal of 1323404340 is 434043231.

It is a self number, because there is not a number n which added to its sum of digits gives 1323404340.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8890 + ... + 52209.

It is an arithmetic number, because the mean of its divisors is an integer number (54317900).

Almost surely, 2^1323404340 is an apocalyptic number.

1323404340 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 1323404340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1955444400).

1323404340 is an abundant number, since it is smaller than the sum of its proper divisors (2587484460).

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

1323404340 is a wasteful number, since it uses less digits than its factorization.

1323404340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61149 (or 61128 counting only the distinct ones).

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

The square root of 1323404340 is about 36378.6247678496. The cubic root of 1323404340 is about 1097.9035386276.

Adding to 1323404340 its reverse (434043231), we get a palindrome (1757447571).

The spelling of 1323404340 in words is "one billion, three hundred twenty-three million, four hundred four thousand, three hundred forty".