38927221 has 4 divisors (see below), whose sum is σ = 38958444. Its totient is φ = 38896000.

The previous prime is 38927209. The next prime is 38927237. The reversal of 38927221 is 12272983.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8346321 + 30580900 = 2889^2 + 5530^2 .

It is a cyclic number.

It is not a de Polignac number, because 38927221 - 2⁹ = 38926709 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 (38927261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13660 + ... + 16261.

It is an arithmetic number, because the mean of its divisors is an integer number (9739611).

Almost surely, 2^38927221 is an apocalyptic number.

It is an amenable number.

38927221 is a deficient number, since it is larger than the sum of its proper divisors (31223).

38927221 is a wasteful number, since it uses less digits than its factorization.

38927221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31222.

The product of its digits is 12096, while the sum is 34.

The square root of 38927221 is about 6239.1682939315. The cubic root of 38927221 is about 338.9100651025.

The spelling of 38927221 in words is "thirty-eight million, nine hundred twenty-seven thousand, two hundred twenty-one".