5618818 has 4 divisors (see below), whose sum is σ = 8428230. Its totient is φ = 2809408.

The previous prime is 5618777. The next prime is 5618819. The reversal of 5618818 is 8188165.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8188165 = 5 ⋅1637633.

It can be written as a sum of positive squares in only one way, i.e., 5602689 + 16129 = 2367^2 + 127^2 .

It is a super-2 number, since 2×5618818² = 63142231434248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5618819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1404703 + ... + 1404706.

Almost surely, 2^5618818 is an apocalyptic number.

5618818 is a deficient number, since it is larger than the sum of its proper divisors (2809412).

5618818 is a wasteful number, since it uses less digits than its factorization.

5618818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2809411.

The product of its digits is 15360, while the sum is 37.

The square root of 5618818 is about 2370.4046068129. The cubic root of 5618818 is about 177.7794895958.

The spelling of 5618818 in words is "five million, six hundred eighteen thousand, eight hundred eighteen".