816867 has 24 divisors (see below), whose sum is σ = 1319760. Its totient is φ = 483840.

The previous prime is 816859. The next prime is 816869. The reversal of 816867 is 768618.

816867 is nontrivially palindromic in base 2.

It is not a de Polignac number, because 816867 - 2³ = 816859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (816869) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2767 + ... + 3047.

It is an arithmetic number, because the mean of its divisors is an integer number (54990).

2⁸¹⁶⁸⁶⁷ is an apocalyptic number.

816867 is a deficient number, since it is larger than the sum of its proper divisors (502893).

816867 is a wasteful number, since it uses less digits than its factorization.

816867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323 (or 320 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 816867 is about 903.8069484132. The cubic root of 816867 is about 93.4796585145.

The spelling of 816867 in words is "eight hundred sixteen thousand, eight hundred sixty-seven".