56439 has 6 divisors (see below), whose sum is σ = 81536. Its totient is φ = 37620.

The previous prime is 56437. The next prime is 56443. The reversal of 56439 is 93465.

It is a happy number.

It is not a de Polignac number, because 56439 - 2¹ = 56437 is a prime.

It is a d-powerful number, because it can be written as 5⁵ + 6⁶ + 4² + 3⁸ + 9² .

It is a Duffinian number.

56439 is a lucky number.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56431) 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 5 ways as a sum of consecutive naturals, for example, 3127 + ... + 3144.

2⁵⁶⁴³⁹ is an apocalyptic number.

56439 is a deficient number, since it is larger than the sum of its proper divisors (25097).

56439 is a wasteful number, since it uses less digits than its factorization.

56439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6277 (or 6274 counting only the distinct ones).

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

The square root of 56439 is about 237.5689373635. The cubic root of 56439 is about 38.3583369745.

The spelling of 56439 in words is "fifty-six thousand, four hundred thirty-nine".