39809136 has 80 divisors (see below), whose sum is σ = 108635904. Its totient is φ = 12536832.

The previous prime is 39809101. The next prime is 39809153. The reversal of 39809136 is 63190893.

39809136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 39809094 and 39809103.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117960 + ... + 118296.

Almost surely, 2^39809136 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 39809136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54317952).

39809136 is an abundant number, since it is smaller than the sum of its proper divisors (68826768).

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

39809136 is a wasteful number, since it uses less digits than its factorization.

39809136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478 (or 472 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 39809136 is about 6309.4481533649. The cubic root of 39809136 is about 341.4503671079.

The spelling of 39809136 in words is "thirty-nine million, eight hundred nine thousand, one hundred thirty-six".