845504 has 28 divisors (see below), whose sum is σ = 1831848. Its totient is φ = 384000.

The previous prime is 845491. The next prime is 845531. The reversal of 845504 is 405548.

845504 is an esthetic number in base 7, because in such base its adjacent digits differ by 1.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 845504.

It is an unprimeable number.

845504 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 3 ways as a sum of consecutive naturals, for example, 104 + ... + 1304.

2⁸⁴⁵⁵⁰⁴ 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 845504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (915924).

845504 is an abundant number, since it is smaller than the sum of its proper divisors (986344).

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

845504 is a wasteful number, since it uses less digits than its factorization.

845504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224 (or 1214 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 845504 is about 919.5129145368. The cubic root of 845504 is about 94.5595119854.

The spelling of 845504 in words is "eight hundred forty-five thousand, five hundred four".