38888891 has 2 divisors, whose sum is σ = 38888892. Its totient is φ = 38888890.

The previous prime is 38888879. The next prime is 38888897. The reversal of 38888891 is 19888883.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38888891 - 2²² = 34694587 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (38888897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19444445 + 19444446.

It is an arithmetic number, because the mean of its divisors is an integer number (19444446).

Almost surely, 2^38888891 is an apocalyptic number.

38888891 is a deficient number, since it is larger than the sum of its proper divisors (1).

38888891 is an equidigital number, since it uses as much as digits as its factorization.

38888891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 884736, while the sum is 53.

The square root of 38888891 is about 6236.0958138887. The cubic root of 38888891 is about 338.7987917356.

The spelling of 38888891 in words is "thirty-eight million, eight hundred eighty-eight thousand, eight hundred ninety-one".