39686704 has 40 divisors (see below), whose sum is σ = 82829520. Its totient is φ = 18352128.

The previous prime is 39686701. The next prime is 39686743. The reversal of 39686704 is 40768693.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (39686701) 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 7 ways as a sum of consecutive naturals, for example, 14812 + ... + 17284.

It is an arithmetic number, because the mean of its divisors is an integer number (2070738).

Almost surely, 2^39686704 is an apocalyptic number.

39686704 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39686704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41414760).

39686704 is an abundant number, since it is smaller than the sum of its proper divisors (43142816).

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

39686704 is a wasteful number, since it uses less digits than its factorization.

39686704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2557 (or 2551 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 39686704 is about 6299.7384072674. The cubic root of 39686704 is about 341.0999669644.

The spelling of 39686704 in words is "thirty-nine million, six hundred eighty-six thousand, seven hundred four".