38613865 has 4 divisors (see below), whose sum is σ = 46336644. Its totient is φ = 30891088.

The previous prime is 38613859. The next prime is 38613893. The reversal of 38613865 is 56831683.

38613865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56831683 = 433 ⋅131251.

It can be written as a sum of positive squares in 2 ways, for example, as 23270976 + 15342889 = 4824^2 + 3917^2 .

It is a cyclic number.

It is not a de Polignac number, because 38613865 - 2⁹ = 38613353 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3861382 + ... + 3861391.

It is an arithmetic number, because the mean of its divisors is an integer number (11584161).

Almost surely, 2^38613865 is an apocalyptic number.

It is an amenable number.

38613865 is a deficient number, since it is larger than the sum of its proper divisors (7722779).

38613865 is an equidigital number, since it uses as much as digits as its factorization.

38613865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7722778.

The product of its digits is 103680, while the sum is 40.

The square root of 38613865 is about 6214.0055519769. The cubic root of 38613865 is about 337.9982289276.

The spelling of 38613865 in words is "thirty-eight million, six hundred thirteen thousand, eight hundred sixty-five".