386867856 has 80 divisors (see below), whose sum is σ = 1043538368. Its totient is φ = 123379200.

The previous prime is 386867851. The next prime is 386867869. The reversal of 386867856 is 658768683.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 386867796 and 386867805.

It is not an unprimeable number, because it can be changed into a prime (386867851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106551 + ... + 110121.

Almost surely, 2^386867856 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 386867856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (521769184).

386867856 is an abundant number, since it is smaller than the sum of its proper divisors (656670512).

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

386867856 is a wasteful number, since it uses less digits than its factorization.

386867856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3680 (or 3674 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 57.

The square root of 386867856 is about 19668.9566576369. The cubic root of 386867856 is about 728.6532095599.

The spelling of 386867856 in words is "three hundred eighty-six million, eight hundred sixty-seven thousand, eight hundred fifty-six".