38888889 has 8 divisors (see below), whose sum is σ = 55840512. Its totient is φ = 23931600.

The previous prime is 38888879. The next prime is 38888891. The reversal of 38888889 is 98888883.

38888889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-38888889 is a prime.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (38888819) by changing a digit.

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, 498537 + ... + 498614.

It is an arithmetic number, because the mean of its divisors is an integer number (6980064).

Almost surely, 2^38888889 is an apocalyptic number.

38888889 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

38888889 is a deficient number, since it is larger than the sum of its proper divisors (16951623).

38888889 is a wasteful number, since it uses less digits than its factorization.

38888889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997167.

The product of its digits is 7077888, while the sum is 60.

The square root of 38888889 is about 6236.0956535319. The cubic root of 38888889 is about 338.7987859276.

The spelling of 38888889 in words is "thirty-eight million, eight hundred eighty-eight thousand, eight hundred eighty-nine".