1323210320 has 40 divisors (see below), whose sum is σ = 3078687624. Its totient is φ = 528901632.

The previous prime is 1323210313. The next prime is 1323210323. The reversal of 1323210320 is 230123231.

It can be written as a sum of positive squares in 4 ways, for example, as 33825856 + 1289384464 = 5816^2 + 35908^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323210323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122582 + ... + 132938.

Almost surely, 2^1323210320 is an apocalyptic number.

1323210320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1323210320 is an abundant number, since it is smaller than the sum of its proper divisors (1755477304).

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

1323210320 is a wasteful number, since it uses less digits than its factorization.

1323210320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11967 (or 11961 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 1323210320 is about 36375.9579942577. The cubic root of 1323210320 is about 1097.8498826515.

Adding to 1323210320 its reverse (230123231), we get a palindrome (1553333551).

The spelling of 1323210320 in words is "one billion, three hundred twenty-three million, two hundred ten thousand, three hundred twenty".