816422 has 4 divisors (see below), whose sum is σ = 1224636. Its totient is φ = 408210.

The previous prime is 816401. The next prime is 816427. The reversal of 816422 is 224618.

816422 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204104 + ... + 204107.

It is an arithmetic number, because the mean of its divisors is an integer number (306159).

2⁸¹⁶⁴²² is an apocalyptic number.

816422 is a deficient number, since it is larger than the sum of its proper divisors (408214).

816422 is a wasteful number, since it uses less digits than its factorization.

816422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408213.

The product of its digits is 768, while the sum is 23.

The square root of 816422 is about 903.5607339853. The cubic root of 816422 is about 93.4626806367.

The spelling of 816422 in words is "eight hundred sixteen thousand, four hundred twenty-two".