386646684 has 12 divisors (see below), whose sum is σ = 902175624. Its totient is φ = 128882224.

The previous prime is 386646679. The next prime is 386646703. The reversal of 386646684 is 486646683.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16110267 + ... + 16110290.

It is an arithmetic number, because the mean of its divisors is an integer number (75181302).

Almost surely, 2^386646684 is an apocalyptic number.

It is an amenable number.

386646684 is an abundant number, since it is smaller than the sum of its proper divisors (515528940).

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

386646684 is a wasteful number, since it uses less digits than its factorization.

386646684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32220564 (or 32220562 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 51.

The square root of 386646684 is about 19663.3334915522. Note that the first 3 decimals coincide. The cubic root of 386646684 is about 728.5143262986.

Subtracting 386646684 from its reverse (486646683), we obtain a palindrome (99999999).

The spelling of 386646684 in words is "three hundred eighty-six million, six hundred forty-six thousand, six hundred eighty-four".