38078905 has 4 divisors (see below), whose sum is σ = 45694692. Its totient is φ = 30463120.

The previous prime is 38078903. The next prime is 38078923. The reversal of 38078905 is 50987083.

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 17909824 + 20169081 = 4232^2 + 4491^2 .

It is not a de Polignac number, because 38078905 - 2¹ = 38078903 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 not an unprimeable number, because it can be changed into a prime (38078903) 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, 3807886 + ... + 3807895.

It is an arithmetic number, because the mean of its divisors is an integer number (11423673).

Almost surely, 2^38078905 is an apocalyptic number.

It is an amenable number.

38078905 is a deficient number, since it is larger than the sum of its proper divisors (7615787).

38078905 is an equidigital number, since it uses as much as digits as its factorization.

38078905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7615786.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 38078905 is about 6170.8107246941. The cubic root of 38078905 is about 336.4300786360.

It can be divided in two parts, 38078 and 905, that added together give a palindrome (38983).

The spelling of 38078905 in words is "thirty-eight million, seventy-eight thousand, nine hundred five".