39947115 has 16 divisors (see below), whose sum is σ = 68832288. Its totient is φ = 19666176.

The previous prime is 39947057. The next prime is 39947119. The reversal of 39947115 is 51174993.

It is a happy number.

39947115 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 39947115 - 2⁶ = 39947051 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (39947119) 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, 102234 + ... + 102623.

It is an arithmetic number, because the mean of its divisors is an integer number (4302018).

Almost surely, 2^39947115 is an apocalyptic number.

39947115 is a deficient number, since it is larger than the sum of its proper divisors (28885173).

39947115 is a wasteful number, since it uses less digits than its factorization.

39947115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204878.

The product of its digits is 34020, while the sum is 39.

The square root of 39947115 is about 6320.3730111442. The cubic root of 39947115 is about 341.8444027330.

The spelling of 39947115 in words is "thirty-nine million, nine hundred forty-seven thousand, one hundred fifteen".