816346 has 4 divisors (see below), whose sum is σ = 1224522. Its totient is φ = 408172.

The previous prime is 816341. The next prime is 816353. The reversal of 816346 is 643618.

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., 748225 + 68121 = 865^2 + 261^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (816341) 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, 204085 + ... + 204088.

2⁸¹⁶³⁴⁶ is an apocalyptic number.

816346 is a deficient number, since it is larger than the sum of its proper divisors (408176).

816346 is a wasteful number, since it uses less digits than its factorization.

816346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408175.

The product of its digits is 3456, while the sum is 28.

The square root of 816346 is about 903.5186771728. The cubic root of 816346 is about 93.4597804274.

The spelling of 816346 in words is "eight hundred sixteen thousand, three hundred forty-six".