8185818 has 8 divisors (see below), whose sum is σ = 16371648. Its totient is φ = 2728604.

The previous prime is 8185817. The next prime is 8185819.

8185818 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (8185817) and next prime (8185819).

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

8185818 is an admirable number.

It is a super-4 number, since 4×8185818⁴ (a number of 29 digits) contains 4444 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (8185813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 682146 + ... + 682157.

It is an arithmetic number, because the mean of its divisors is an integer number (2046456).

Almost surely, 2^8185818 is an apocalyptic number.

8185818 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.

8185818 is a wasteful number, since it uses less digits than its factorization.

8185818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1364308.

The product of its digits is 20480, while the sum is 39.

The square root of 8185818 is about 2861.0868564236. The cubic root of 8185818 is about 201.5366466811.

The spelling of 8185818 in words is "eight million, one hundred eighty-five thousand, eight hundred eighteen".