386878686 has 32 divisors (see below), whose sum is σ = 781670400. Its totient is φ = 127648224.

The previous prime is 386878669. The next prime is 386878693. The reversal of 386878686 is 686878683.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 265536 + ... + 266988.

It is an arithmetic number, because the mean of its divisors is an integer number (24427200).

Almost surely, 2^386878686 is an apocalyptic number.

386878686 is an abundant number, since it is smaller than the sum of its proper divisors (394791714).

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

386878686 is a wasteful number, since it uses less digits than its factorization.

386878686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1880.

The product of its digits is 18579456, while the sum is 60.

The square root of 386878686 is about 19669.2319626365. The cubic root of 386878686 is about 728.6600088158.

The spelling of 386878686 in words is "three hundred eighty-six million, eight hundred seventy-eight thousand, six hundred eighty-six".