39538947 has 16 divisors (see below), whose sum is σ = 61015040. Its totient is φ = 22306752.

The previous prime is 39538921. The next prime is 39538949. The reversal of 39538947 is 74983593.

It is not a de Polignac number, because 39538947 - 2¹⁰ = 39537923 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39538896 and 39538905.

It is not an unprimeable number, because it can be changed into a prime (39538949) 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 15 ways as a sum of consecutive naturals, for example, 10258 + ... + 13575.

It is an arithmetic number, because the mean of its divisors is an integer number (3813440).

Almost surely, 2^39538947 is an apocalyptic number.

39538947 is a deficient number, since it is larger than the sum of its proper divisors (21476093).

39538947 is a wasteful number, since it uses less digits than its factorization.

39538947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23922.

The product of its digits is 816480, while the sum is 48.

The square root of 39538947 is about 6288.0002385496. Note that the first 3 decimals coincide. The cubic root of 39538947 is about 340.6761257266.

The spelling of 39538947 in words is "thirty-nine million, five hundred thirty-eight thousand, nine hundred forty-seven".