609644 has 12 divisors (see below), whose sum is σ = 1219344. Its totient is φ = 261264.

The previous prime is 609641. The next prime is 609673. The reversal of 609644 is 446906.

609644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

609644 is an admirable number.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (609641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10859 + ... + 10914.

It is an arithmetic number, because the mean of its divisors is an integer number (101612).

2⁶⁰⁹⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

609644 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

609644 is a wasteful number, since it uses less digits than its factorization.

609644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21784 (or 21782 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 609644 is about 780.7970286829. The cubic root of 609644 is about 84.7927592607.

The spelling of 609644 in words is "six hundred nine thousand, six hundred forty-four".