38663869 has 4 divisors (see below), whose sum is σ = 38753596. Its totient is φ = 38574144.

The previous prime is 38663843. The next prime is 38663957. The reversal of 38663869 is 96836683.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3404025 + 35259844 = 1845^2 + 5938^2 .

It is a cyclic number.

It is not a de Polignac number, because 38663869 - 2⁹ = 38663357 is a prime.

It is a super-2 number, since 2×38663869² = 2989789532098322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38663809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44214 + ... + 45079.

It is an arithmetic number, because the mean of its divisors is an integer number (9688399).

Almost surely, 2^38663869 is an apocalyptic number.

It is an amenable number.

38663869 is a deficient number, since it is larger than the sum of its proper divisors (89727).

38663869 is an equidigital number, since it uses as much as digits as its factorization.

38663869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89726.

The product of its digits is 1119744, while the sum is 49.

The square root of 38663869 is about 6218.0277419774. The cubic root of 38663869 is about 338.1440657759.

The spelling of 38663869 in words is "thirty-eight million, six hundred sixty-three thousand, eight hundred sixty-nine".