386646678 has 48 divisors (see below), whose sum is σ = 916106256. Its totient is φ = 116881920.

The previous prime is 386646671. The next prime is 386646679. The reversal of 386646678 is 876646683.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (386646671) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 88350 + ... + 92622.

It is an arithmetic number, because the mean of its divisors is an integer number (19085547).

Almost surely, 2^386646678 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 386646678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (458053128).

386646678 is an abundant number, since it is smaller than the sum of its proper divisors (529459578).

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

386646678 is a wasteful number, since it uses less digits than its factorization.

386646678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4749 (or 4746 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 54.

The square root of 386646678 is about 19663.3333389840. Note that the first 5 decimals coincide. The cubic root of 386646678 is about 728.5143225302.

The spelling of 386646678 in words is "three hundred eighty-six million, six hundred forty-six thousand, six hundred seventy-eight".