38685517 has 16 divisors (see below), whose sum is σ = 43908480. Its totient is φ = 33815232.

The previous prime is 38685503. The next prime is 38685587. The reversal of 38685517 is 71558683.

38685517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 38685517 - 2¹⁵ = 38652749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38685587) 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 15 ways as a sum of consecutive naturals, for example, 31998 + ... + 33184.

It is an arithmetic number, because the mean of its divisors is an integer number (2744280).

Almost surely, 2^38685517 is an apocalyptic number.

It is an amenable number.

38685517 is a deficient number, since it is larger than the sum of its proper divisors (5222963).

38685517 is a wasteful number, since it uses less digits than its factorization.

38685517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332.

The product of its digits is 201600, while the sum is 43.

The square root of 38685517 is about 6219.7682432708. The cubic root of 38685517 is about 338.2071632461.

The spelling of 38685517 in words is "thirty-eight million, six hundred eighty-five thousand, five hundred seventeen".