2005618 has 4 divisors (see below), whose sum is σ = 3008430. Its totient is φ = 1002808.

The previous prime is 2005613. The next prime is 2005667. The reversal of 2005618 is 8165002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1108809 + 896809 = 1053^2 + 947^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (2005613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501403 + ... + 501406.

2^2005618 is an apocalyptic number.

2005618 is a deficient number, since it is larger than the sum of its proper divisors (1002812).

2005618 is a wasteful number, since it uses less digits than its factorization.

2005618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002811.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 2005618 is about 1416.1984324239. The cubic root of 2005618 is about 126.1099653094.

It can be divided in two parts, 200 and 5618, that multiplied together give a square (1123600 = 1060²).

The spelling of 2005618 in words is "two million, five thousand, six hundred eighteen".