38381887 has 2 divisors, whose sum is σ = 38381888. Its totient is φ = 38381886.

The previous prime is 38381851. The next prime is 38381891. The reversal of 38381887 is 78818383.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38381887 - 2¹¹ = 38379839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38381807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19190943 + 19190944.

It is an arithmetic number, because the mean of its divisors is an integer number (19190944).

Almost surely, 2^38381887 is an apocalyptic number.

38381887 is a deficient number, since it is larger than the sum of its proper divisors (1).

38381887 is an equidigital number, since it uses as much as digits as its factorization.

38381887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 258048, while the sum is 46.

The square root of 38381887 is about 6195.3116951450. The cubic root of 38381887 is about 337.3200123064.

The spelling of 38381887 in words is "thirty-eight million, three hundred eighty-one thousand, eight hundred eighty-seven".