816418 has 4 divisors (see below), whose sum is σ = 1224630. Its totient is φ = 408208.

The previous prime is 816401. The next prime is 816427. The reversal of 816418 is 814618.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 762129 + 54289 = 873^2 + 233^2 .

It is a plaindrome in base 12.

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204103 + ... + 204106.

2⁸¹⁶⁴¹⁸ is an apocalyptic number.

816418 is a deficient number, since it is larger than the sum of its proper divisors (408212).

816418 is a wasteful number, since it uses less digits than its factorization.

816418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408211.

The product of its digits is 1536, while the sum is 28.

The square root of 816418 is about 903.5585205176. The cubic root of 816418 is about 93.4625279986.

The spelling of 816418 in words is "eight hundred sixteen thousand, four hundred eighteen".