816446 has 4 divisors (see below), whose sum is σ = 1224672. Its totient is φ = 408222.

The previous prime is 816443. The next prime is 816451. The reversal of 816446 is 644618.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204110 + ... + 204113.

It is an arithmetic number, because the mean of its divisors is an integer number (306168).

2⁸¹⁶⁴⁴⁶ is an apocalyptic number.

816446 is a deficient number, since it is larger than the sum of its proper divisors (408226).

816446 is a wasteful number, since it uses less digits than its factorization.

816446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408225.

The product of its digits is 4608, while the sum is 29.

The square root of 816446 is about 903.5740146773. The cubic root of 816446 is about 93.4635964549.

The spelling of 816446 in words is "eight hundred sixteen thousand, four hundred forty-six".