543636 has 18 divisors (see below), whose sum is σ = 1374282. Its totient is φ = 181200.

The previous prime is 543617. The next prime is 543637. The reversal of 543636 is 636345.

It can be written as a sum of positive squares in only one way, i.e., 367236 + 176400 = 606^2 + 420^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 543636.

It is not an unprimeable number, because it can be changed into a prime (543637) by changing a digit.

543636 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 5 ways as a sum of consecutive naturals, for example, 7515 + ... + 7586.

It is an arithmetic number, because the mean of its divisors is an integer number (76349).

2⁵⁴³⁶³⁶ is an apocalyptic number.

It is an amenable number.

543636 is an abundant number, since it is smaller than the sum of its proper divisors (830646).

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

543636 is a wasteful number, since it uses less digits than its factorization.

543636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15111 (or 15106 counting only the distinct ones).

The product of its digits is 6480, while the sum is 27.

The square root of 543636 is about 737.3167568962. The cubic root of 543636 is about 81.6148905928.

The spelling of 543636 in words is "five hundred forty-three thousand, six hundred thirty-six".