818040 has 64 divisors (see below), whose sum is σ = 2604960. Its totient is φ = 204800.

The previous prime is 818021. The next prime is 818093. The reversal of 818040 is 40818.

It is a junction number, because it is equal to n+sod(n) for n = 817998 and 818016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1840 + ... + 2240.

2⁸¹⁸⁰⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 818040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1302480).

818040 is an abundant number, since it is smaller than the sum of its proper divisors (1786920).

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

818040 is a wasteful number, since it uses less digits than its factorization.

818040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432 (or 428 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 818040 is about 904.4556373864. The cubic root of 818040 is about 93.5243819091.

Adding to 818040 its reverse (40818), we get a palindrome (858858).

The spelling of 818040 in words is "eight hundred eighteen thousand, forty".