1644412 has 48 divisors (see below), whose sum is σ = 3790080. Its totient is φ = 604800.

The previous prime is 1644373. The next prime is 1644413. The reversal of 1644412 is 2144461.

It is a super-3 number, since 3×1644412³ = 13339918208830027584, which contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1644413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5712 + ... + 5992.

It is an arithmetic number, because the mean of its divisors is an integer number (78960).

2^1644412 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1644412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1895040).

1644412 is an abundant number, since it is smaller than the sum of its proper divisors (2145668).

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

1644412 is a wasteful number, since it uses less digits than its factorization.

1644412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322 (or 320 counting only the distinct ones).

The product of its digits is 768, while the sum is 22.

The square root of 1644412 is about 1282.3462870847. The cubic root of 1644412 is about 118.0330272389.

Adding to 1644412 its reverse (2144461), we get a palindrome (3788873).

The spelling of 1644412 in words is "one million, six hundred forty-four thousand, four hundred twelve".