386999684 has 12 divisors (see below), whose sum is σ = 677407500. Its totient is φ = 193454688.

The previous prime is 386999681. The next prime is 386999689. The reversal of 386999684 is 486999683.

It can be written as a sum of positive squares in 2 ways, for example, as 7139584 + 379860100 = 2672^2 + 19490^2 .

It is a super-3 number, since 3×386999684³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (386999681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14582 + ... + 31410.

It is an arithmetic number, because the mean of its divisors is an integer number (56450625).

Almost surely, 2^386999684 is an apocalyptic number.

It is an amenable number.

386999684 is a deficient number, since it is larger than the sum of its proper divisors (290407816).

386999684 is a wasteful number, since it uses less digits than its factorization.

386999684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22582 (or 22580 counting only the distinct ones).

The product of its digits is 20155392, while the sum is 62.

The square root of 386999684 is about 19672.3075413130. The cubic root of 386999684 is about 728.7359647653.

Subtracting 386999684 from its reverse (486999683), we obtain a palindrome (99999999).

The spelling of 386999684 in words is "three hundred eighty-six million, nine hundred ninety-nine thousand, six hundred eighty-four".