1323225240 has 128 divisors (see below), whose sum is σ = 4103827200. Its totient is φ = 341107200.

The previous prime is 1323225203. The next prime is 1323225269. The reversal of 1323225240 is 425223231.

1323225240 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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 1323225240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 519891 + ... + 522429.

It is an arithmetic number, because the mean of its divisors is an integer number (32061150).

Almost surely, 2^1323225240 is an apocalyptic number.

1323225240 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 1323225240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2051913600).

1323225240 is an abundant number, since it is smaller than the sum of its proper divisors (2780601960).

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

1323225240 is a wasteful number, since it uses less digits than its factorization.

1323225240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2697 (or 2693 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 1323225240 is about 36376.1630741891. The cubic root of 1323225240 is about 1097.8540089440.

Adding to 1323225240 its reverse (425223231), we get a palindrome (1748448471).

The spelling of 1323225240 in words is "one billion, three hundred twenty-three million, two hundred twenty-five thousand, two hundred forty".