39899808 has 72 divisors (see below), whose sum is σ = 122204628. Its totient is φ = 12275712.

The previous prime is 39899803. The next prime is 39899809. The reversal of 39899808 is 80899893.

It can be written as a sum of positive squares in 2 ways, for example, as 31674384 + 8225424 = 5628^2 + 2868^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a zygodrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (39899803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1585 + ... + 9072.

Almost surely, 2^39899808 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 39899808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61102314).

39899808 is an abundant number, since it is smaller than the sum of its proper divisors (82304820).

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

39899808 is a wasteful number, since it uses less digits than its factorization.

39899808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10686 (or 10675 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The square root of 39899808 is about 6316.6294809811. The cubic root of 39899808 is about 341.7094074101.

The spelling of 39899808 in words is "thirty-nine million, eight hundred ninety-nine thousand, eight hundred eight".