539640 has 48 divisors (see below), whose sum is σ = 1755000. Its totient is φ = 143808.

The previous prime is 539639. The next prime is 539641. The reversal of 539640 is 46935.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (539639) and next prime (539641).

It is a super-2 number, since 2×539640² = 582422659200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (539641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 390 + ... + 1109.

2⁵³⁹⁶⁴⁰ is an apocalyptic number.

It is an amenable number.

539640 is an abundant number, since it is smaller than the sum of its proper divisors (1215360).

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

539640 is a wasteful number, since it uses less digits than its factorization.

539640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1516 (or 1509 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 539640 is about 734.6019330222. The cubic root of 539640 is about 81.4144283576.

The spelling of 539640 in words is "five hundred thirty-nine thousand, six hundred forty".