845500 has 48 divisors (see below), whose sum is σ = 1965600. Its totient is φ = 316800.

The previous prime is 845491. The next prime is 845531. The reversal of 845500 is 5548.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

845500 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 15 ways as a sum of consecutive naturals, for example, 9456 + ... + 9544.

It is an arithmetic number, because the mean of its divisors is an integer number (40950).

2⁸⁴⁵⁵⁰⁰ 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 845500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (982800).

845500 is an abundant number, since it is smaller than the sum of its proper divisors (1120100).

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

845500 is a wasteful number, since it uses less digits than its factorization.

845500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 845500 is about 919.5107394696. The cubic root of 845500 is about 94.5593628678.

It can be divided in two parts, 845 and 500, that multiplied together give a square (422500 = 650²).

The spelling of 845500 in words is "eight hundred forty-five thousand, five hundred".