39686944 has 48 divisors (see below), whose sum is σ = 88010496. Its totient is φ = 17452800.

The previous prime is 39686923. The next prime is 39686987. The reversal of 39686944 is 44968693.

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, 9094 + ... + 12730.

It is an arithmetic number, because the mean of its divisors is an integer number (1833552).

Almost surely, 2^39686944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39686944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44005248).

39686944 is an abundant number, since it is smaller than the sum of its proper divisors (48323552).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39686944 is a wasteful number, since it uses less digits than its factorization.

39686944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3689 (or 3681 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 49.

The square root of 39686944 is about 6299.7574556486. The cubic root of 39686944 is about 341.1006545484.

The spelling of 39686944 in words is "thirty-nine million, six hundred eighty-six thousand, nine hundred forty-four".