38663639 has 8 divisors (see below), whose sum is σ = 44353440. Its totient is φ = 33015456.

The previous prime is 38663617. The next prime is 38663663. The reversal of 38663639 is 93636683.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 38663639 - 2¹⁶ = 38598103 is a prime.

It is a super-3 number, since 3×38663639³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38663639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38665639) 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 7 ways as a sum of consecutive naturals, for example, 8384 + ... + 12149.

It is an arithmetic number, because the mean of its divisors is an integer number (5544180).

Almost surely, 2^38663639 is an apocalyptic number.

38663639 is a deficient number, since it is larger than the sum of its proper divisors (5689801).

38663639 is a wasteful number, since it uses less digits than its factorization.

38663639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20809.

The product of its digits is 419904, while the sum is 44.

The square root of 38663639 is about 6218.0092473395. The cubic root of 38663639 is about 338.1433952680.

The spelling of 38663639 in words is "thirty-eight million, six hundred sixty-three thousand, six hundred thirty-nine".