1323130320 has 60 divisors (see below), whose sum is σ = 4443515076. Its totient is φ = 352834560.

The previous prime is 1323130309. The next prime is 1323130327. The reversal of 1323130320 is 230313231.

1323130320 is a `hidden beast` number, since 1 + 32 + 313 + 0 + 320 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 492307344 + 830822976 = 22188^2 + 28824^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1323130293 and 1323130302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323130327) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 918121 + ... + 919560.

Almost surely, 2^1323130320 is an apocalyptic number.

1323130320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1323130320 is an abundant number, since it is smaller than the sum of its proper divisors (3120384756).

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

1323130320 is a wasteful number, since it uses less digits than its factorization.

1323130320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1837700 (or 1837691 counting only the distinct ones).

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

The square root of 1323130320 is about 36374.8583502397. The cubic root of 1323130320 is about 1097.8277572293.

Adding to 1323130320 its reverse (230313231), we get a palindrome (1553443551).

The spelling of 1323130320 in words is "one billion, three hundred twenty-three million, one hundred thirty thousand, three hundred twenty".