42039686 has 16 divisors (see below), whose sum is σ = 68926704. Its totient is φ = 19112544.

The previous prime is 42039677. The next prime is 42039707. The reversal of 42039686 is 68693024.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 10325 + ... + 13808.

It is an arithmetic number, because the mean of its divisors is an integer number (4307919).

Almost surely, 2^42039686 is an apocalyptic number.

42039686 is a deficient number, since it is larger than the sum of its proper divisors (26887018).

42039686 is a wasteful number, since it uses less digits than its factorization.

42039686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24215.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 42039686 is about 6483.8018168356. The cubic root of 42039686 is about 347.7121138271.

The spelling of 42039686 in words is "forty-two million, thirty-nine thousand, six hundred eighty-six".