38618889 has 4 divisors (see below), whose sum is σ = 51491856. Its totient is φ = 25745924.

The previous prime is 38618873. The next prime is 38618891. The reversal of 38618889 is 98881683.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 38618889 - 2⁴ = 38618873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38618989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6436479 + ... + 6436484.

It is an arithmetic number, because the mean of its divisors is an integer number (12872964).

Almost surely, 2^38618889 is an apocalyptic number.

It is an amenable number.

38618889 is a deficient number, since it is larger than the sum of its proper divisors (12872967).

38618889 is a wasteful number, since it uses less digits than its factorization.

38618889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12872966.

The product of its digits is 663552, while the sum is 51.

The square root of 38618889 is about 6214.4097869387. The cubic root of 38618889 is about 338.0128871293.

The spelling of 38618889 in words is "thirty-eight million, six hundred eighteen thousand, eight hundred eighty-nine".