1323402320 has 80 divisors (see below), whose sum is σ = 3151464960. Its totient is φ = 516672000.

The previous prime is 1323402263. The next prime is 1323402329. The reversal of 1323402320 is 232043231.

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 (20).

It is a junction number, because it is equal to n+sod(n) for n = 1323402292 and 1323402301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323402329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 677345 + ... + 679295.

It is an arithmetic number, because the mean of its divisors is an integer number (39393312).

Almost surely, 2^1323402320 is an apocalyptic number.

1323402320 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 1323402320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1575732480).

1323402320 is an abundant number, since it is smaller than the sum of its proper divisors (1828062640).

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

1323402320 is a wasteful number, since it uses less digits than its factorization.

1323402320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2164 (or 2158 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 1323402320 is about 36378.5970042826. The cubic root of 1323402320 is about 1097.9029800263.

Adding to 1323402320 its reverse (232043231), we get a palindrome (1555445551).

The spelling of 1323402320 in words is "one billion, three hundred twenty-three million, four hundred two thousand, three hundred twenty".