544509 has 32 divisors (see below), whose sum is σ = 957440. Its totient is φ = 299376.

The previous prime is 544501. The next prime is 544513. The reversal of 544509 is 905445.

It is not a de Polignac number, because 544509 - 2³ = 544501 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (544501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8094 + ... + 8160.

It is an arithmetic number, because the mean of its divisors is an integer number (29920).

2⁵⁴⁴⁵⁰⁹ is an apocalyptic number.

It is an amenable number.

544509 is a deficient number, since it is larger than the sum of its proper divisors (412931).

544509 is a wasteful number, since it uses less digits than its factorization.

544509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 544509 is about 737.9085309169. The cubic root of 544509 is about 81.6585544258.

The spelling of 544509 in words is "five hundred forty-four thousand, five hundred nine".