386774784 has 144 divisors (see below), whose sum is σ = 1247984640. Its totient is φ = 117181440.

The previous prime is 386774783. The next prime is 386774813. The reversal of 386774784 is 487477683.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 386774784.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (386774783) 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, 73489 + ... + 78575.

It is an arithmetic number, because the mean of its divisors is an integer number (8666560).

Almost surely, 2^386774784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 386774784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (623992320).

386774784 is an abundant number, since it is smaller than the sum of its proper divisors (861209856).

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

386774784 is a wasteful number, since it uses less digits than its factorization.

386774784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5123 (or 5103 counting only the distinct ones).

The product of its digits is 6322176, while the sum is 54.

The square root of 386774784 is about 19666.5905535250. The cubic root of 386774784 is about 728.5947721636.

The spelling of 386774784 in words is "three hundred eighty-six million, seven hundred seventy-four thousand, seven hundred eighty-four".