57778 has 8 divisors (see below), whose sum is σ = 99072. Its totient is φ = 24756.

The previous prime is 57773. The next prime is 57781. The reversal of 57778 is 87775.

It is a happy number.

57778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (57773) 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, 2050 + ... + 2077.

It is an arithmetic number, because the mean of its divisors is an integer number (12384).

2⁵⁷⁷⁷⁸ is an apocalyptic number.

57778 is a deficient number, since it is larger than the sum of its proper divisors (41294).

57778 is a wasteful number, since it uses less digits than its factorization.

57778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4136.

The product of its digits is 13720, while the sum is 34.

The square root of 57778 is about 240.3705472807. The cubic root of 57778 is about 38.6593162141.

The spelling of 57778 in words is "fifty-seven thousand, seven hundred seventy-eight".