539840 has 56 divisors (see below), whose sum is σ = 1475232. Its totient is φ = 184320.

The previous prime is 539839. The next prime is 539843. The reversal of 539840 is 48935.

It is a tau number, because it is divible by the number of its divisors (56).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 539840.

It is not an unprimeable number, because it can be changed into a prime (539843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2120 + ... + 2360.

2⁵³⁹⁸⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 539840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (737616).

539840 is an abundant number, since it is smaller than the sum of its proper divisors (935392).

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

539840 is a wasteful number, since it uses less digits than its factorization.

539840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265 (or 255 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 539840 is about 734.7380485588. The cubic root of 539840 is about 81.4244849845.

The spelling of 539840 in words is "five hundred thirty-nine thousand, eight hundred forty".