543990 has 16 divisors (see below), whose sum is σ = 1305648. Its totient is φ = 145056.

The previous prime is 543971. The next prime is 543997. The reversal of 543990 is 99345.

543990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 18133 = 543990 / (5 + 4 + 3 + 9 + 9 + 0).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (543997) by changing a digit.

543990 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 7 ways as a sum of consecutive naturals, for example, 9037 + ... + 9096.

It is an arithmetic number, because the mean of its divisors is an integer number (81603).

2⁵⁴³⁹⁹⁰ is an apocalyptic number.

543990 is an abundant number, since it is smaller than the sum of its proper divisors (761658).

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

543990 is a wasteful number, since it uses less digits than its factorization.

543990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18143.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 543990 is about 737.5567774755. The cubic root of 543990 is about 81.6326018325.

The spelling of 543990 in words is "five hundred forty-three thousand, nine hundred ninety".