38936421 has 6 divisors (see below), whose sum is σ = 56241510. Its totient is φ = 25957608.

The previous prime is 38936411. The next prime is 38936423. The reversal of 38936421 is 12463983.

38936421 is a `hidden beast` number, since 3 + 8 + 9 + 3 + 642 + 1 = 666.

38936421 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 only one way, i.e., 21622500 + 17313921 = 4650^2 + 4161^2 .

It is not a de Polignac number, because 38936421 - 2²¹ = 36839269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38936423) 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 5 ways as a sum of consecutive naturals, for example, 2163126 + ... + 2163143.

It is an arithmetic number, because the mean of its divisors is an integer number (9373585).

Almost surely, 2^38936421 is an apocalyptic number.

It is an amenable number.

38936421 is a deficient number, since it is larger than the sum of its proper divisors (17305089).

38936421 is a wasteful number, since it uses less digits than its factorization.

38936421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4326275 (or 4326272 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 38936421 is about 6239.9055281310. The cubic root of 38936421 is about 338.9367621620.

The spelling of 38936421 in words is "thirty-eight million, nine hundred thirty-six thousand, four hundred twenty-one".