38887221 has 8 divisors (see below), whose sum is σ = 51880000. Its totient is φ = 25909632.

The previous prime is 38887217. The next prime is 38887223. The reversal of 38887221 is 12278883.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 38887221 - 2² = 38887217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38887221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38887223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5280 + ... + 10278.

It is an arithmetic number, because the mean of its divisors is an integer number (6485000).

Almost surely, 2^38887221 is an apocalyptic number.

It is an amenable number.

38887221 is a deficient number, since it is larger than the sum of its proper divisors (12992779).

38887221 is a wasteful number, since it uses less digits than its factorization.

38887221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7595.

The product of its digits is 43008, while the sum is 39.

The square root of 38887221 is about 6235.9619145726. The cubic root of 38887221 is about 338.7939420037.

The spelling of 38887221 in words is "thirty-eight million, eight hundred eighty-seven thousand, two hundred twenty-one".