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3618 = 23367

3618 has 16 divisors (see below), whose sum is σ = 8160. Its totient is φ = 1188.

The previous prime is 3617. The next prime is 3623. The reversal of 3618 is 8163.

Added to its reverse (8163) it gives a triangular number (11781 = T153).

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (18).

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

Its product of digits (144) is a multiple of the sum of its prime divisors (72).

It is a Curzon number.

It is a plaindrome in base 7, base 11, base 14 and base 15.

It is a nialpdrome in base 16.

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 3618.

It is not an unprimeable number, because it can be changed into a prime (3613) 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 7 ways as a sum of consecutive naturals, for example, 21 + ... + 87.

It is an arithmetic number, because the mean of its divisors is an integer number (510).

It is a practical number, because each smaller number is the sum of distinct divisors of 3618, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4080).

3618 is an abundant number, since it is smaller than the sum of its proper divisors (4542).

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

3618 is a wasteful number, since it uses less digits than its factorization.

3618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78 (or 72 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 3618 is about 60.1498129673. The cubic root of 3618 is about 15.3516898407.

Subtracting from 3618 its sum of digits (18), we obtain a square (3600 = 602).

Adding to 3618 its reverse (8163), we get a triangular number (11781 = T153).

The spelling of 3618 in words is "three thousand, six hundred eighteen".

Divisors: 1 2 3 6 9 18 27 54 67 134 201 402 603 1206 1809 3618