816500 has 48 divisors (see below), whose sum is σ = 1886976. Its totient is φ = 308000.

The previous prime is 816499. The next prime is 816521. The reversal of 816500 is 5618.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 816500.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 11465 + ... + 11535.

It is an arithmetic number, because the mean of its divisors is an integer number (39312).

2⁸¹⁶⁵⁰⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 816500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (943488).

816500 is an abundant number, since it is smaller than the sum of its proper divisors (1070476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

816500 is a wasteful number, since it uses less digits than its factorization.

816500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 816500 is about 903.6038955206. The cubic root of 816500 is about 93.4656569802.

The spelling of 816500 in words is "eight hundred sixteen thousand, five hundred".