38613639 has 8 divisors (see below), whose sum is σ = 51521392. Its totient is φ = 25724160.

The previous prime is 38613599. The next prime is 38613661. The reversal of 38613639 is 93631683.

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

It is not a de Polignac number, because 38613639 - 2²⁵ = 5059207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 38613597 and 38613606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38613689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1527 + ... + 8919.

It is an arithmetic number, because the mean of its divisors is an integer number (6440174).

Almost surely, 2^38613639 is an apocalyptic number.

38613639 is a deficient number, since it is larger than the sum of its proper divisors (12907753).

38613639 is a wasteful number, since it uses less digits than its factorization.

38613639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9137.

The product of its digits is 69984, while the sum is 39.

The square root of 38613639 is about 6213.9873672224. The cubic root of 38613639 is about 337.9975695121.

The spelling of 38613639 in words is "thirty-eight million, six hundred thirteen thousand, six hundred thirty-nine".