56778 has 8 divisors (see below), whose sum is σ = 113568. Its totient is φ = 18924.

The previous prime is 56773. The next prime is 56779. The reversal of 56778 is 87765.

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

56778 is an admirable number.

It is a Curzon number.

It is a plaindrome in base 10.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (56773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4726 + ... + 4737.

It is an arithmetic number, because the mean of its divisors is an integer number (14196).

2⁵⁶⁷⁷⁸ is an apocalyptic number.

56778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56784).

56778 is a wasteful number, since it uses less digits than its factorization.

56778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9468.

The product of its digits is 11760, while the sum is 33.

The square root of 56778 is about 238.2813463115. The cubic root of 56778 is about 38.4349833107.

The spelling of 56778 in words is "fifty-six thousand, seven hundred seventy-eight".