38638613 has 8 divisors (see below), whose sum is σ = 41843256. Its totient is φ = 35467200.

The previous prime is 38638601. The next prime is 38638651. The reversal of 38638613 is 31683683.

It can be written as a sum of positive squares in 4 ways, for example, as 8421604 + 30217009 = 2902^2 + 5497^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 38638613 - 2⁸ = 38638357 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38638673) 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 7 ways as a sum of consecutive naturals, for example, 5858 + ... + 10563.

It is an arithmetic number, because the mean of its divisors is an integer number (5230407).

Almost surely, 2^38638613 is an apocalyptic number.

It is an amenable number.

38638613 is a deficient number, since it is larger than the sum of its proper divisors (3204643).

38638613 is a wasteful number, since it uses less digits than its factorization.

38638613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16615.

The product of its digits is 62208, while the sum is 38.

The square root of 38638613 is about 6215.9965411831. The cubic root of 38638613 is about 338.0704222860.

The spelling of 38638613 in words is "thirty-eight million, six hundred thirty-eight thousand, six hundred thirteen".