38648138 has 4 divisors (see below), whose sum is σ = 57972210. Its totient is φ = 19324068.

The previous prime is 38648107. The next prime is 38648149. The reversal of 38648138 is 83184683.

It is a happy number.

38648138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 24078649 + 14569489 = 4907^2 + 3817^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 38648095 and 38648104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9662033 + ... + 9662036.

Almost surely, 2^38648138 is an apocalyptic number.

38648138 is a deficient number, since it is larger than the sum of its proper divisors (19324072).

38648138 is a wasteful number, since it uses less digits than its factorization.

38648138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19324071.

The product of its digits is 110592, while the sum is 41.

The square root of 38648138 is about 6216.7626623509. The cubic root of 38648138 is about 338.0981998204.

The spelling of 38648138 in words is "thirty-eight million, six hundred forty-eight thousand, one hundred thirty-eight".