1323120366 has 64 divisors (see below), whose sum is σ = 3108441600. Its totient is φ = 416016000.

The previous prime is 1323120349. The next prime is 1323120367. The reversal of 1323120366 is 6630213231.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323120367) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 244591 + ... + 249941.

It is an arithmetic number, because the mean of its divisors is an integer number (48569400).

Almost surely, 2^1323120366 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1323120366, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1554220800).

1323120366 is an abundant number, since it is smaller than the sum of its proper divisors (1785321234).

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

1323120366 is a wasteful number, since it uses less digits than its factorization.

1323120366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5622 (or 5616 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 1323120366 is about 36374.7215247072. The cubic root of 1323120366 is about 1097.8250042113.

Adding to 1323120366 its reverse (6630213231), we get a palindrome (7953333597).

The spelling of 1323120366 in words is "one billion, three hundred twenty-three million, one hundred twenty thousand, three hundred sixty-six".