816920 has 32 divisors (see below), whose sum is σ = 1980720. Its totient is φ = 301440.

The previous prime is 816919. The next prime is 816929. The reversal of 816920 is 29618.

816920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 816920.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266 + ... + 1305.

2⁸¹⁶⁹²⁰ is an apocalyptic number.

It is an amenable number.

816920 is an abundant number, since it is smaller than the sum of its proper divisors (1163800).

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

816920 is a wasteful number, since it uses less digits than its factorization.

816920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1595 (or 1591 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 816920 is about 903.8362683584. The cubic root of 816920 is about 93.4816801878.

The spelling of 816920 in words is "eight hundred sixteen thousand, nine hundred twenty".