39686434 has 16 divisors (see below), whose sum is σ = 60313176. Its totient is φ = 19584000.

The previous prime is 39686429. The next prime is 39686441. The reversal of 39686434 is 43468693.

It can be written as a sum of positive squares in 4 ways, for example, as 39652209 + 34225 = 6297^2 + 185^2 .

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, 65734 + ... + 66334.

Almost surely, 2^39686434 is an apocalyptic number.

39686434 is a deficient number, since it is larger than the sum of its proper divisors (20626742).

39686434 is a wasteful number, since it uses less digits than its factorization.

39686434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981.

The product of its digits is 373248, while the sum is 43.

The square root of 39686434 is about 6299.7169777697. The cubic root of 39686434 is about 341.0991934291.

The spelling of 39686434 in words is "thirty-nine million, six hundred eighty-six thousand, four hundred thirty-four".