845800 has 24 divisors (see below), whose sum is σ = 1966950. Its totient is φ = 338240.

The previous prime is 845777. The next prime is 845809. The reversal of 845800 is 8548.

It can be written as a sum of positive squares in 3 ways, for example, as 820836 + 24964 = 906^2 + 158^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (845809) by changing a digit.

845800 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1915 + ... + 2314.

2⁸⁴⁵⁸⁰⁰ is an apocalyptic number.

It is an amenable number.

845800 is an abundant number, since it is smaller than the sum of its proper divisors (1121150).

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

845800 is a wasteful number, since it uses less digits than its factorization.

845800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4245 (or 4236 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 845800 is about 919.6738552335. The cubic root of 845800 is about 94.5705453848.

The spelling of 845800 in words is "eight hundred forty-five thousand, eight hundred".