38638287 has 12 divisors (see below), whose sum is σ = 56354064. Its totient is φ = 25508160.

The previous prime is 38638283. The next prime is 38638309. The reversal of 38638287 is 78283683.

38638287 is a `hidden beast` number, since 3 + 8 + 638 + 2 + 8 + 7 = 666.

It is not a de Polignac number, because 38638287 - 2² = 38638283 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38638283) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19914 + ... + 21767.

It is an arithmetic number, because the mean of its divisors is an integer number (4696172).

Almost surely, 2^38638287 is an apocalyptic number.

38638287 is a deficient number, since it is larger than the sum of its proper divisors (17715777).

38638287 is a wasteful number, since it uses less digits than its factorization.

38638287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41790 (or 41787 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 38638287 is about 6215.9703184620. The cubic root of 38638287 is about 338.0694714990.

The spelling of 38638287 in words is "thirty-eight million, six hundred thirty-eight thousand, two hundred eighty-seven".