56785 has 8 divisors (see below), whose sum is σ = 70056.
Its totient is φ = 44160.
The previous prime is 56783. The next prime is 56807. The reversal of 56785 is 58765.
It can be divided in two parts, 56 and 785, that added together give a square (841 = 292).
56785 = 1682 + 1692.
It can be written as a sum of positive squares in 4 ways, for example, as 1089 + 55696 = 33^2 + 236^2
It is a sphenic number, since it is the product of 3 distinct primes.
It is not a de Polignac number, because 56785 - 21 = 56783 is a prime.
It is an alternating number because its digits alternate between odd and even.
It is a Duffinian 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 (56783) 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, 67 + ... + 343.
It is an arithmetic number, because the mean of its divisors is an integer number (8757).
256785 is an apocalyptic number.
56785 is the 169-th centered square number.
It is an amenable number.
56785 is a deficient number, since it is larger than the sum of its proper divisors (13271).
56785 is a wasteful number, since it uses less digits than its factorization.
56785 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 323.
The product of its digits is 8400, while the sum is 31.
The square root of 56785 is about 238.2960343774.
The cubic root of 56785 is about 38.4365627594.
The spelling of 56785 in words is "fifty-six thousand, seven hundred eighty-five".