609444 has 84 divisors (see below), whose sum is σ = 1836240. Its totient is φ = 174960.

The previous prime is 609443. The next prime is 609461. The reversal of 609444 is 444906.

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

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 609444.

It is not an unprimeable number, because it can be changed into a prime (609443) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 32067 + ... + 32085.

It is an arithmetic number, because the mean of its divisors is an integer number (21860).

2⁶⁰⁹⁴⁴⁴ 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 609444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (918120).

609444 is an abundant number, since it is smaller than the sum of its proper divisors (1226796).

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

609444 is a wasteful number, since it uses less digits than its factorization.

609444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52 (or 35 counting only the distinct ones).

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

The square root of 609444 is about 780.6689439193. The cubic root of 609444 is about 84.7834858669.

The spelling of 609444 in words is "six hundred nine thousand, four hundred forty-four".