386838666 has 40 divisors (see below), whose sum is σ = 867947520. Its totient is φ = 128776392.

The previous prime is 386838653. The next prime is 386838667. The reversal of 386838666 is 666838683.

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

It is not an unprimeable number, because it can be changed into a prime (386838667) 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 19 ways as a sum of consecutive naturals, for example, 206265 + ... + 208131.

It is an arithmetic number, because the mean of its divisors is an integer number (21698688).

Almost surely, 2^386838666 is an apocalyptic number.

386838666 is an abundant number, since it is smaller than the sum of its proper divisors (481108854).

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

386838666 is a wasteful number, since it uses less digits than its factorization.

386838666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3160 (or 3151 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 54.

The square root of 386838666 is about 19668.2146113978. The cubic root of 386838666 is about 728.6348829558.

The spelling of 386838666 in words is "three hundred eighty-six million, eight hundred thirty-eight thousand, six hundred sixty-six".