1323123320 has 32 divisors (see below), whose sum is σ = 3040372800. Its totient is φ = 517987968.

The previous prime is 1323123317. The next prime is 1323123343. The reversal of 1323123320 is 233213231.

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 = 1323123292 and 1323123301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 350015 + ... + 353774.

It is an arithmetic number, because the mean of its divisors is an integer number (95011650).

Almost surely, 2^1323123320 is an apocalyptic number.

1323123320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1323123320 is an abundant number, since it is smaller than the sum of its proper divisors (1717249480).

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

1323123320 is a wasteful number, since it uses less digits than its factorization.

1323123320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703847 (or 703843 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 1323123320 is about 36374.7621298064. The cubic root of 1323123320 is about 1097.8258212125.

Adding to 1323123320 its reverse (233213231), we get a palindrome (1556336551).

The spelling of 1323123320 in words is "one billion, three hundred twenty-three million, one hundred twenty-three thousand, three hundred twenty".