818474 has 4 divisors (see below), whose sum is σ = 1227714. Its totient is φ = 409236.

The previous prime is 818473. The next prime is 818509. The reversal of 818474 is 474818.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 474818 = 2 ⋅237409.

It can be written as a sum of positive squares in only one way, i.e., 797449 + 21025 = 893^2 + 145^2 .

It is a super-3 number, since 3×818474³ = 1644886433368201272, which contains 333 as substring.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 818474.

It is not an unprimeable number, because it can be changed into a prime (818473) 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, 204617 + ... + 204620.

2⁸¹⁸⁴⁷⁴ is an apocalyptic number.

818474 is a deficient number, since it is larger than the sum of its proper divisors (409240).

818474 is a wasteful number, since it uses less digits than its factorization.

818474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409239.

The product of its digits is 7168, while the sum is 32.

The square root of 818474 is about 904.6955288936. The cubic root of 818474 is about 93.5409183481.

The spelling of 818474 in words is "eight hundred eighteen thousand, four hundred seventy-four".