43618 has 8 divisors (see below), whose sum is σ = 66348. Its totient is φ = 21504.

The previous prime is 43613. The next prime is 43627. The reversal of 43618 is 81634.

43618 is an esthetic number in base 15, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in 2 ways, for example, as 34969 + 8649 = 187^2 + 93^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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

43618 is an undulating number in base 15.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130 + ... + 322.

2⁴³⁶¹⁸ is an apocalyptic number.

43618 is a deficient number, since it is larger than the sum of its proper divisors (22730).

43618 is a wasteful number, since it uses less digits than its factorization.

43618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308.

The product of its digits is 576, while the sum is 22.

The square root of 43618 is about 208.8492279133. The cubic root of 43618 is about 35.2010201151.

It can be divided in two parts, 436 and 18, that added together give a palindrome (454).

The spelling of 43618 in words is "forty-three thousand, six hundred eighteen".