810018 has 24 divisors (see below), whose sum is σ = 1915056. Its totient is φ = 245400.

The previous prime is 810013. The next prime is 810023.

It is a happy number.

810018 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (810013) and next prime (810023).

It is a super-2 number, since 2×810018² = 1312258320648, which contains 22 as substring.

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

810018 is a strobogrammatic number because it is the same when read upside-down.

It is not an unprimeable number, because it can be changed into a prime (810013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1848 + ... + 2243.

It is an arithmetic number, because the mean of its divisors is an integer number (79794).

2⁸¹⁰⁰¹⁸ is an apocalyptic number.

810018 is an abundant number, since it is smaller than the sum of its proper divisors (1105038).

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

810018 is a wasteful number, since it uses less digits than its factorization.

810018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4110 (or 4107 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

The square root of 810018 is about 900.0099999444. The cubic root of 810018 is about 93.2176656696.

Subtracting from 810018 its sum of digits (18), we obtain a 4-th power (810000 = 30⁴).

It can be divided in two parts, 8100 and 18, that added together give a palindrome (8118).

The spelling of 810018 in words is "eight hundred ten thousand, eighteen".