38613818 has 4 divisors (see below), whose sum is σ = 57920730. Its totient is φ = 19306908.

The previous prime is 38613791. The next prime is 38613823. The reversal of 38613818 is 81831683.

38613818 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., 25775929 + 12837889 = 5077^2 + 3583^2 .

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, 9653453 + ... + 9653456.

Almost surely, 2^38613818 is an apocalyptic number.

38613818 is a deficient number, since it is larger than the sum of its proper divisors (19306912).

38613818 is a wasteful number, since it uses less digits than its factorization.

38613818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19306911.

The product of its digits is 27648, while the sum is 38.

The square root of 38613818 is about 6214.0017701961. The cubic root of 38613818 is about 337.9980917927.

The spelling of 38613818 in words is "thirty-eight million, six hundred thirteen thousand, eight hundred eighteen".