54778 has 8 divisors (see below), whose sum is σ = 83700. Its totient is φ = 26880.

The previous prime is 54773. The next prime is 54779. The reversal of 54778 is 87745.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 51529 + 3249 = 227^2 + 57^2 .

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

It is an Ulam number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (54773) 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 3 ways as a sum of consecutive naturals, for example, 103 + ... + 346.

2⁵⁴⁷⁷⁸ is an apocalyptic number.

54778 is a deficient number, since it is larger than the sum of its proper divisors (28922).

54778 is a wasteful number, since it uses less digits than its factorization.

54778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512.

The product of its digits is 7840, while the sum is 31.

The square root of 54778 is about 234.0470038262. The cubic root of 54778 is about 37.9782886132.

It can be divided in two parts, 547 and 78, that added together give a 4-th power (625 = 5⁴).

The spelling of 54778 in words is "fifty-four thousand, seven hundred seventy-eight".