38888821 has 4 divisors (see below), whose sum is σ = 38902752. Its totient is φ = 38874892.

The previous prime is 38888819. The next prime is 38888831. The reversal of 38888821 is 12888883.

38888821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 38888821 - 2¹ = 38888819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38888831) 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 3 ways as a sum of consecutive naturals, for example, 1171 + ... + 8896.

It is an arithmetic number, because the mean of its divisors is an integer number (9725688).

Almost surely, 2^38888821 is an apocalyptic number.

It is an amenable number.

38888821 is a deficient number, since it is larger than the sum of its proper divisors (13931).

38888821 is a wasteful number, since it uses less digits than its factorization.

38888821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13930.

The product of its digits is 196608, while the sum is 46.

The square root of 38888821 is about 6236.0902014002. The cubic root of 38888821 is about 338.7985884562.

It can be divided in two parts, 3888882 and 1, that added together give a palindrome (3888883).

The spelling of 38888821 in words is "thirty-eight million, eight hundred eighty-eight thousand, eight hundred twenty-one".