540489 has 8 divisors (see below), whose sum is σ = 731680. Its totient is φ = 354816.

The previous prime is 540469. The next prime is 540509. The reversal of 540489 is 984045.

540489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (540469) and next prime (540509).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 540489 - 2⁸ = 540233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (540469) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1144 + ... + 1545.

It is an arithmetic number, because the mean of its divisors is an integer number (91460).

2⁵⁴⁰⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

540489 is a deficient number, since it is larger than the sum of its proper divisors (191191).

540489 is a wasteful number, since it uses less digits than its factorization.

540489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2759.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 540489 is about 735.1795699011. The cubic root of 540489 is about 81.4571016414.

Subtracting 540489 from its reverse (984045), we obtain a square (443556 = 666²).

The spelling of 540489 in words is "five hundred forty thousand, four hundred eighty-nine".