39808144 has 10 divisors (see below), whose sum is σ = 77128310. Its totient is φ = 19904064.

The previous prime is 39808133. The next prime is 39808157. The reversal of 39808144 is 44180893.

39808144 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 34105600 + 5702544 = 5840^2 + 2388^2 .

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 as a sum of consecutive naturals, namely, 1243989 + ... + 1244020.

It is an arithmetic number, because the mean of its divisors is an integer number (7712831).

Almost surely, 2^39808144 is an apocalyptic number.

It is an amenable number.

39808144 is a deficient number, since it is larger than the sum of its proper divisors (37320166).

39808144 is a wasteful number, since it uses less digits than its factorization.

39808144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2488017 (or 2488011 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 39808144 is about 6309.3695406118. The cubic root of 39808144 is about 341.4475308948.

The spelling of 39808144 in words is "thirty-nine million, eight hundred eight thousand, one hundred forty-four".