573444 has 36 divisors (see below), whose sum is σ = 1536444. Its totient is φ = 179712.

The previous prime is 573437. The next prime is 573451. The reversal of 573444 is 444375.

It is an interprime number because it is at equal distance from previous prime (573437) and next prime (573451).

It can be written as a sum of positive squares in 2 ways, for example, as 213444 + 360000 = 462^2 + 600^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×573444² = 657676042272, which contains 22 as substring.

It is an unprimeable number.

573444 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 144 + ... + 1080.

It is an arithmetic number, because the mean of its divisors is an integer number (42679).

573444 is a Friedman number, since it can be written as 4+7*5*4^(4+3), using all its digits and the basic arithmetic operations.

2⁵⁷³⁴⁴⁴ 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 573444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (768222).

573444 is an abundant number, since it is smaller than the sum of its proper divisors (963000).

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

573444 is a wasteful number, since it uses less digits than its factorization.

573444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964 (or 959 counting only the distinct ones).

The product of its digits is 6720, while the sum is 27.

The square root of 573444 is about 757.2608533392. The cubic root of 573444 is about 83.0800988023.

It can be divided in two parts, 5734 and 44, that added together give a triangular number (5778 = T₁₀₇).

The spelling of 573444 in words is "five hundred seventy-three thousand, four hundred forty-four".