38221885 has 12 divisors (see below), whose sum is σ = 49666932. Its totient is φ = 28224768.

The previous prime is 38221873. The next prime is 38221889. The reversal of 38221885 is 58812283.

38221885 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 6 ways, for example, as 840889 + 37380996 = 917^2 + 6114^2 .

It is not a de Polignac number, because 38221885 - 2⁹ = 38221373 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 (38221889) 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 11 ways as a sum of consecutive naturals, for example, 21772 + ... + 23461.

It is an arithmetic number, because the mean of its divisors is an integer number (4138911).

Almost surely, 2^38221885 is an apocalyptic number.

It is an amenable number.

38221885 is a deficient number, since it is larger than the sum of its proper divisors (11445047).

38221885 is a wasteful number, since it uses less digits than its factorization.

38221885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45264 (or 45251 counting only the distinct ones).

The product of its digits is 30720, while the sum is 37.

The square root of 38221885 is about 6182.3850575648. The cubic root of 38221885 is about 336.8506325003.

The spelling of 38221885 in words is "thirty-eight million, two hundred twenty-one thousand, eight hundred eighty-five".