386778912 has 96 divisors (see below), whose sum is σ = 1120210560. Its totient is φ = 116090880.

The previous prime is 386778911. The next prime is 386778919. The reversal of 386778912 is 219877683.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (386778911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47389 + ... + 54947.

It is an arithmetic number, because the mean of its divisors is an integer number (11668860).

Almost surely, 2^386778912 is an apocalyptic number.

386778912 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 386778912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (560105280).

386778912 is an abundant number, since it is smaller than the sum of its proper divisors (733431648).

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

386778912 is a wasteful number, since it uses less digits than its factorization.

386778912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7626 (or 7618 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 51.

The square root of 386778912 is about 19666.6955028037. The cubic root of 386778912 is about 728.5973642220.

The spelling of 386778912 in words is "three hundred eighty-six million, seven hundred seventy-eight thousand, nine hundred twelve".