539978 has 8 divisors (see below), whose sum is σ = 831972. Its totient is φ = 262656.

The previous prime is 539947. The next prime is 539993. The reversal of 539978 is 879935.

It can be written as a sum of positive squares in 2 ways, for example, as 528529 + 11449 = 727^2 + 107^2 .

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

It is a Curzon number.

It is an unprimeable number.

539978 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 3 ways as a sum of consecutive naturals, for example, 3575 + ... + 3722.

2⁵³⁹⁹⁷⁸ is an apocalyptic number.

539978 is a deficient number, since it is larger than the sum of its proper divisors (291994).

539978 is a wasteful number, since it uses less digits than its factorization.

539978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7336.

The product of its digits is 68040, while the sum is 41.

The square root of 539978 is about 734.8319535785. The cubic root of 539978 is about 81.4314226090.

The spelling of 539978 in words is "five hundred thirty-nine thousand, nine hundred seventy-eight".