386857986 has 16 divisors (see below), whose sum is σ = 780564384. Its totient is φ = 127811264.

The previous prime is 386857963. The next prime is 386858027. The reversal of 386857986 is 689758683.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 284616 + ... + 285971.

It is an arithmetic number, because the mean of its divisors is an integer number (48785274).

Almost surely, 2^386857986 is an apocalyptic number.

386857986 is an abundant number, since it is smaller than the sum of its proper divisors (393706398).

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

386857986 is a wasteful number, since it uses less digits than its factorization.

386857986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570705.

The product of its digits is 17418240, while the sum is 60.

The square root of 386857986 is about 19668.7057530484. The cubic root of 386857986 is about 728.6470128976.

The spelling of 386857986 in words is "three hundred eighty-six million, eight hundred fifty-seven thousand, nine hundred eighty-six".