573640 has 16 divisors (see below), whose sum is σ = 1290780. Its totient is φ = 229440.

The previous prime is 573637. The next prime is 573647. The reversal of 573640 is 46375.

573640 is nontrivially palindromic in base 16.

It can be written as a sum of positive squares in 2 ways, for example, as 487204 + 86436 = 698^2 + 294^2 .

It is not an unprimeable number, because it can be changed into a prime (573647) 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, 7131 + ... + 7210.

2⁵⁷³⁶⁴⁰ is an apocalyptic number.

It is an amenable number.

573640 is an abundant number, since it is smaller than the sum of its proper divisors (717140).

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

573640 is a wasteful number, since it uses less digits than its factorization.

573640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14352 (or 14348 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 573640 is about 757.3902560767. The cubic root of 573640 is about 83.0895631641.

It can be divided in two parts, 5736 and 40, that added together give a square (5776 = 76²).

The spelling of 573640 in words is "five hundred seventy-three thousand, six hundred forty".