38561638 has 16 divisors (see below), whose sum is σ = 59549760. Its totient is φ = 18720000.

The previous prime is 38561617. The next prime is 38561641. The reversal of 38561638 is 83616583.

38561638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 38561638.

It is a congruent number.

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 in 7 ways as a sum of consecutive naturals, for example, 7638 + ... + 11638.

It is an arithmetic number, because the mean of its divisors is an integer number (3721860).

Almost surely, 2^38561638 is an apocalyptic number.

38561638 is a deficient number, since it is larger than the sum of its proper divisors (20988122).

38561638 is a wasteful number, since it uses less digits than its factorization.

38561638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4143.

The product of its digits is 103680, while the sum is 40.

The square root of 38561638 is about 6209.8017681726. The cubic root of 38561638 is about 337.8457742057.

The spelling of 38561638 in words is "thirty-eight million, five hundred sixty-one thousand, six hundred thirty-eight".