39387439 has 16 divisors (see below), whose sum is σ = 48706560. Its totient is φ = 31016160.

The previous prime is 39387433. The next prime is 39387479. The reversal of 39387439 is 93478393.

It is not a de Polignac number, because 39387439 - 2⁷ = 39387311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39387433) 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, 20844 + ... + 22654.

It is an arithmetic number, because the mean of its divisors is an integer number (3044160).

Almost surely, 2^39387439 is an apocalyptic number.

39387439 is a deficient number, since it is larger than the sum of its proper divisors (9319121).

39387439 is a wasteful number, since it uses less digits than its factorization.

39387439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2070.

The product of its digits is 489888, while the sum is 46.

The square root of 39387439 is about 6275.9412839828. The cubic root of 39387439 is about 340.2404268309.

The spelling of 39387439 in words is "thirty-nine million, three hundred eighty-seven thousand, four hundred thirty-nine".