38649685 has 4 divisors (see below), whose sum is σ = 46379628. Its totient is φ = 30919744.

The previous prime is 38649659. The next prime is 38649727. The reversal of 38649685 is 58694683.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18740241 + 19909444 = 4329^2 + 4462^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38649685 is a prime.

It is a Smith number, since the sum of its digits (49) 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 a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3864964 + ... + 3864973.

It is an arithmetic number, because the mean of its divisors is an integer number (11594907).

Almost surely, 2^38649685 is an apocalyptic number.

It is an amenable number.

38649685 is a deficient number, since it is larger than the sum of its proper divisors (7729943).

38649685 is an equidigital number, since it uses as much as digits as its factorization.

38649685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7729942.

The product of its digits is 1244160, while the sum is 49.

The square root of 38649685 is about 6216.8870827770. The cubic root of 38649685 is about 338.1027108694.

The spelling of 38649685 in words is "thirty-eight million, six hundred forty-nine thousand, six hundred eighty-five".