386993865 has 32 divisors (see below), whose sum is σ = 657296640. Its totient is φ = 193757184.

The previous prime is 386993861. The next prime is 386993869. The reversal of 386993865 is 568399683.

It is an interprime number because it is at equal distance from previous prime (386993861) and next prime (386993869).

It is not a de Polignac number, because 386993865 - 2² = 386993861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (386993861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110217 + ... + 113673.

It is an arithmetic number, because the mean of its divisors is an integer number (20540520).

Almost surely, 2^386993865 is an apocalyptic number.

It is an amenable number.

386993865 is a deficient number, since it is larger than the sum of its proper divisors (270302775).

386993865 is a wasteful number, since it uses less digits than its factorization.

386993865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3921.

The product of its digits is 8398080, while the sum is 57.

The square root of 386993865 is about 19672.1596424999. The cubic root of 386993865 is about 728.7323122767.

The spelling of 386993865 in words is "three hundred eighty-six million, nine hundred ninety-three thousand, eight hundred sixty-five".