38545618 has 4 divisors (see below), whose sum is σ = 57818430. Its totient is φ = 19272808.

The previous prime is 38545603. The next prime is 38545649. The reversal of 38545618 is 81654583.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81654583 = 701 ⋅116483.

It can be written as a sum of positive squares in only one way, i.e., 38526849 + 18769 = 6207^2 + 137^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9636403 + ... + 9636406.

Almost surely, 2^38545618 is an apocalyptic number.

38545618 is a deficient number, since it is larger than the sum of its proper divisors (19272812).

38545618 is a wasteful number, since it uses less digits than its factorization.

38545618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19272811.

The product of its digits is 115200, while the sum is 40.

The square root of 38545618 is about 6208.5117379288. The cubic root of 38545618 is about 337.7989829796.

The spelling of 38545618 in words is "thirty-eight million, five hundred forty-five thousand, six hundred eighteen".