38639889 has 8 divisors (see below), whose sum is σ = 57244320. Its totient is φ = 25759908.

The previous prime is 38639851. The next prime is 38639893. The reversal of 38639889 is 98893683.

It is not a de Polignac number, because 38639889 - 2⁸ = 38639633 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (38639899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 715527 + ... + 715580.

It is an arithmetic number, because the mean of its divisors is an integer number (7155540).

Almost surely, 2^38639889 is an apocalyptic number.

It is an amenable number.

38639889 is a deficient number, since it is larger than the sum of its proper divisors (18604431).

38639889 is a wasteful number, since it uses less digits than its factorization.

38639889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1431116 (or 1431110 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The square root of 38639889 is about 6216.0991787455. The cubic root of 38639889 is about 338.0741437197.

The spelling of 38639889 in words is "thirty-eight million, six hundred thirty-nine thousand, eight hundred eighty-nine".