38639902 has 16 divisors (see below), whose sum is σ = 66401280. Its totient is φ = 16519608.

The previous prime is 38639899. The next prime is 38639933. The reversal of 38639902 is 20993683.

38639902 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 7 ways as a sum of consecutive naturals, for example, 3003 + ... + 9289.

It is an arithmetic number, because the mean of its divisors is an integer number (4150080).

Almost surely, 2^38639902 is an apocalyptic number.

38639902 is a deficient number, since it is larger than the sum of its proper divisors (27761378).

38639902 is a wasteful number, since it uses less digits than its factorization.

38639902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6735.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 38639902 is about 6216.1002244172. The cubic root of 38639902 is about 338.0741816336.

The spelling of 38639902 in words is "thirty-eight million, six hundred thirty-nine thousand, nine hundred two".