386778 has 16 divisors (see below), whose sum is σ = 884160. Its totient is φ = 110496.

The previous prime is 386777. The next prime is 386809. The reversal of 386778 is 877683.

386778 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 386778.

It is not an unprimeable number, because it can be changed into a prime (386777) 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, 4563 + ... + 4646.

It is an arithmetic number, because the mean of its divisors is an integer number (55260).

2³⁸⁶⁷⁷⁸ is an apocalyptic number.

386778 is an abundant number, since it is smaller than the sum of its proper divisors (497382).

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

386778 is a wasteful number, since it uses less digits than its factorization.

386778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9221.

The product of its digits is 56448, while the sum is 39.

The square root of 386778 is about 621.9147851595. The cubic root of 386778 is about 72.8596791560.

The spelling of 386778 in words is "three hundred eighty-six thousand, seven hundred seventy-eight".