1323644 has 24 divisors (see below), whose sum is σ = 2714208. Its totient is φ = 552960.

The previous prime is 1323629. The next prime is 1323649. The reversal of 1323644 is 4463231.

It is a happy number.

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, 572 + ... + 1724.

It is an arithmetic number, because the mean of its divisors is an integer number (113092).

2^1323644 is an apocalyptic number.

1323644 is a gapful number since it is divisible by the number (14) 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 1323644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1357104).

1323644 is an abundant number, since it is smaller than the sum of its proper divisors (1390564).

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

1323644 is a wasteful number, since it uses less digits than its factorization.

1323644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1205 (or 1203 counting only the distinct ones).

The product of its digits is 1728, while the sum is 23.

The square root of 1323644 is about 1150.4972837865. The cubic root of 1323644 is about 109.7969809047.

Adding to 1323644 its reverse (4463231), we get a palindrome (5786875).

The spelling of 1323644 in words is "one million, three hundred twenty-three thousand, six hundred forty-four".