39490816 has 72 divisors (see below), whose sum is σ = 86829120. Its totient is φ = 17842176.

The previous prime is 39490799. The next prime is 39490823. The reversal of 39490816 is 61809493.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111696 + ... + 112048.

It is an arithmetic number, because the mean of its divisors is an integer number (1205960).

Almost surely, 2^39490816 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 39490816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43414560).

39490816 is an abundant number, since it is smaller than the sum of its proper divisors (47338304).

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

39490816 is a wasteful number, since it uses less digits than its factorization.

39490816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411 (or 397 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 39490816 is about 6284.1718627039. The cubic root of 39490816 is about 340.5378338922.

The spelling of 39490816 in words is "thirty-nine million, four hundred ninety thousand, eight hundred sixteen".