38624021 has 2 divisors, whose sum is σ = 38624022. Its totient is φ = 38624020.

The previous prime is 38624011. The next prime is 38624057. The reversal of 38624021 is 12042683.

38624021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19483396 + 19140625 = 4414^2 + 4375^2 .

It is an emirp because it is prime and its reverse (12042683) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38624021 - 2¹⁴ = 38607637 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38624011) 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 as a sum of consecutive naturals, namely, 19312010 + 19312011.

It is an arithmetic number, because the mean of its divisors is an integer number (19312011).

Almost surely, 2^38624021 is an apocalyptic number.

It is an amenable number.

38624021 is a deficient number, since it is larger than the sum of its proper divisors (1).

38624021 is an equidigital number, since it uses as much as digits as its factorization.

38624021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 38624021 is about 6214.8226845180. The cubic root of 38624021 is about 338.0278591231.

The spelling of 38624021 in words is "thirty-eight million, six hundred twenty-four thousand, twenty-one".