1323021330 has 128 divisors (see below), whose sum is σ = 3634191360. Its totient is φ = 342328320.

The previous prime is 1323021263. The next prime is 1323021331. The reversal of 1323021330 is 331203231.

1323021330 is a `hidden beast` number, since 1 + 32 + 302 + 1 + 330 = 666.

1323021330 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 (18).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1323021331) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1738150 + ... + 1738910.

It is an arithmetic number, because the mean of its divisors is an integer number (28392120).

Almost surely, 2^1323021330 is an apocalyptic number.

1323021330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1323021330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1817095680).

1323021330 is an abundant number, since it is smaller than the sum of its proper divisors (2311170030).

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

1323021330 is a wasteful number, since it uses less digits than its factorization.

1323021330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961 (or 955 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 1323021330 is about 36373.3601692227. The cubic root of 1323021330 is about 1097.7976126721.

Adding to 1323021330 its reverse (331203231), we get a palindrome (1654224561).

The spelling of 1323021330 in words is "one billion, three hundred twenty-three million, twenty-one thousand, three hundred thirty".