38018889 has 10 divisors (see below), whose sum is σ = 56793770. Its totient is φ = 25345872.

The previous prime is 38018887. The next prime is 38018891. The reversal of 38018889 is 98881083.

It is an interprime number because it is at equal distance from previous prime (38018887) and next prime (38018891).

It can be written as a sum of positive squares in only one way, i.e., 38007225 + 11664 = 6165^2 + 108^2 .

It is not a de Polignac number, because 38018889 - 2¹ = 38018887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38018881) 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 9 ways as a sum of consecutive naturals, for example, 234604 + ... + 234765.

It is an arithmetic number, because the mean of its divisors is an integer number (5679377).

Almost surely, 2^38018889 is an apocalyptic number.

It is an amenable number.

38018889 is a deficient number, since it is larger than the sum of its proper divisors (18774881).

38018889 is an equidigital number, since it uses as much as digits as its factorization.

38018889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469381 (or 469372 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 45.

The square root of 38018889 is about 6165.9459128345. The cubic root of 38018889 is about 336.2532370256.

The spelling of 38018889 in words is "thirty-eight million, eighteen thousand, eight hundred eighty-nine".