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618 = 23103

618 has 8 divisors (see below), whose sum is σ = 1248. Its totient is φ = 204.

The previous prime is 617. The next prime is 619. The reversal of 618 is 816.

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

It is an interprime number because it is at equal distance from previous prime (617) and next prime (619).

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

618 is an admirable number.

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

618 is a modest number, since divided by 18 gives 6 as remainder.

It is a Curzon number.

It is a plaindrome in base 16.

It is a nialpdrome in base 5 and base 14.

It is a zygodrome in base 5.

It is a junction number, because it is equal to n+sod(n) for n = 597 and 606.

It is not an unprimeable number, because it can be changed into a prime (613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46 + ... + 57.

It is an arithmetic number, because the mean of its divisors is an integer number (156).

618 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (624).

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

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

The sum of its prime factors is 108.

The product of its digits is 48, while the sum is 15.

The square root of 618 is about 24.8596057893. The cubic root of 618 is about 8.5178402690.

Adding to 618 its product of digits (48), we get a palindrome (666).

The spelling of 618 in words is "six hundred eighteen", and thus it is an aban number and an oban number.

Divisors: 1 2 3 6 103 206 309 618