53778 has 8 divisors (see below), whose sum is σ = 107568. Its totient is φ = 17924.

The previous prime is 53777. The next prime is 53783. The reversal of 53778 is 87735.

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

53778 is an admirable number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 53778.

It is not an unprimeable number, because it can be changed into a prime (53773) 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, 4476 + ... + 4487.

It is an arithmetic number, because the mean of its divisors is an integer number (13446).

2⁵³⁷⁷⁸ is an apocalyptic number.

53778 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 (53784).

53778 is a wasteful number, since it uses less digits than its factorization.

53778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8968.

The product of its digits is 5880, while the sum is 30.

The square root of 53778 is about 231.9008408782. The cubic root of 53778 is about 37.7457635993.

The spelling of 53778 in words is "fifty-three thousand, seven hundred seventy-eight".