38018689 has 4 divisors (see below), whose sum is σ = 38309040. Its totient is φ = 37728340.

The previous prime is 38018683. The next prime is 38018693. The reversal of 38018689 is 98681083.

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 38018689 - 2⁵ = 38018657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38018683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144979 + ... + 145240.

It is an arithmetic number, because the mean of its divisors is an integer number (9577260).

Almost surely, 2^38018689 is an apocalyptic number.

It is an amenable number.

38018689 is a deficient number, since it is larger than the sum of its proper divisors (290351).

38018689 is a wasteful number, since it uses less digits than its factorization.

38018689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290350.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 38018689 is about 6165.9296947014. The cubic root of 38018689 is about 336.2526473997.

The spelling of 38018689 in words is "thirty-eight million, eighteen thousand, six hundred eighty-nine".