816838 has 16 divisors (see below), whose sum is σ = 1353024. Its totient is φ = 366760.

The previous prime is 816821. The next prime is 816839. The reversal of 816838 is 838618.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816839) 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 in 7 ways as a sum of consecutive naturals, for example, 2181 + ... + 2527.

It is an arithmetic number, because the mean of its divisors is an integer number (84564).

2⁸¹⁶⁸³⁸ is an apocalyptic number.

816838 is a deficient number, since it is larger than the sum of its proper divisors (536186).

816838 is a wasteful number, since it uses less digits than its factorization.

816838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467.

The product of its digits is 9216, while the sum is 34.

The square root of 816838 is about 903.7909050217. The cubic root of 816838 is about 93.4785522788.

It can be divided in two parts, 81 and 6838, that multiplied together give a triangular number (553878 = T₁₀₅₂).

The spelling of 816838 in words is "eight hundred sixteen thousand, eight hundred thirty-eight".