1323648 has 64 divisors (see below), whose sum is σ = 3916800. Its totient is φ = 440064.

The previous prime is 1323629. The next prime is 1323649. The reversal of 1323648 is 8463231.

It is a happy number.

1323648 is a `hidden beast` number, since 13 + 2 + 3 + 648 = 666.

It is a tau number, because it is divible by the number of its divisors (64).

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

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323649) 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, 3265 + ... + 3647.

It is an arithmetic number, because the mean of its divisors is an integer number (61200).

2^1323648 is an apocalyptic number.

1323648 is a gapful number since it is divisible by the number (18) 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 1323648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1958400).

1323648 is an abundant number, since it is smaller than the sum of its proper divisors (2593152).

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

1323648 is an equidigital number, since it uses as much as digits as its factorization.

1323648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406 (or 388 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 1323648 is about 1150.4990221639. The cubic root of 1323648 is about 109.7970915053.

Adding to 1323648 its product of digits (3456), we get a square (1327104 = 1152²).

1323648 divided by its product of digits (3456) gives a palindrome (383).

Adding to 1323648 its reverse (8463231), we get a palindrome (9786879).

The spelling of 1323648 in words is "one million, three hundred twenty-three thousand, six hundred forty-eight".