543640 has 16 divisors (see below), whose sum is σ = 1223280. Its totient is φ = 217440.

The previous prime is 543637. The next prime is 543659. The reversal of 543640 is 46345.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6756 + ... + 6835.

It is an arithmetic number, because the mean of its divisors is an integer number (76455).

2⁵⁴³⁶⁴⁰ is an apocalyptic number.

It is an amenable number.

543640 is an abundant number, since it is smaller than the sum of its proper divisors (679640).

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

543640 is a wasteful number, since it uses less digits than its factorization.

543640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13602 (or 13598 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 543640 is about 737.3194694296. The cubic root of 543640 is about 81.6150907628.

Adding to 543640 its reverse (46345), we get a palindrome (589985).

It can be divided in two parts, 5436 and 40, that added together give a square (5476 = 74²).

The spelling of 543640 in words is "five hundred forty-three thousand, six hundred forty".