38638129 has 4 divisors (see below), whose sum is σ = 39182400. Its totient is φ = 38093860.

The previous prime is 38638087. The next prime is 38638133. The reversal of 38638129 is 92183683.

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 38638129 - 2¹⁹ = 38113841 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 38638091 and 38638100.

It is not an unprimeable number, because it can be changed into a prime (38638729) 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, 272029 + ... + 272170.

It is an arithmetic number, because the mean of its divisors is an integer number (9795600).

Almost surely, 2^38638129 is an apocalyptic number.

It is an amenable number.

38638129 is a deficient number, since it is larger than the sum of its proper divisors (544271).

38638129 is an equidigital number, since it uses as much as digits as its factorization.

38638129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544270.

The product of its digits is 62208, while the sum is 40.

The square root of 38638129 is about 6215.9576092506. The cubic root of 38638129 is about 338.0690106863.

The spelling of 38638129 in words is "thirty-eight million, six hundred thirty-eight thousand, one hundred twenty-nine".