38684709 has 20 divisors (see below), whose sum is σ = 66044704. Its totient is φ = 22105224.

The previous prime is 38684687. The next prime is 38684719. The reversal of 38684709 is 90748683.

It is a happy number.

It is not a de Polignac number, because 38684709 - 2⁵ = 38684677 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 (38684719) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 33547 + ... + 34680.

Almost surely, 2^38684709 is an apocalyptic number.

It is an amenable number.

38684709 is a deficient number, since it is larger than the sum of its proper divisors (27359995).

38684709 is an equidigital number, since it uses as much as digits as its factorization.

38684709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68246 (or 68237 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 38684709 is about 6219.7032887430. The cubic root of 38684709 is about 338.2048085898.

It can be divided in two parts, 38684 and 709, that added together give a palindrome (39393).

The spelling of 38684709 in words is "thirty-eight million, six hundred eighty-four thousand, seven hundred nine".