38666889 has 56 divisors (see below), whose sum is σ = 62956800. Its totient is φ = 23677920.

The previous prime is 38666861. The next prime is 38666939. The reversal of 38666889 is 98866683.

It is not a de Polignac number, because 38666889 - 2¹⁵ = 38634121 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (38666189) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 655342 + ... + 655400.

Almost surely, 2^38666889 is an apocalyptic number.

It is an amenable number.

38666889 is a deficient number, since it is larger than the sum of its proper divisors (24289911).

38666889 is an equidigital number, since it uses as much as digits as its factorization.

38666889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137 (or 122 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 54.

The square root of 38666889 is about 6218.2705795100. The cubic root of 38666889 is about 338.1528695895.

The spelling of 38666889 in words is "thirty-eight million, six hundred sixty-six thousand, eight hundred eighty-nine".