845680 has 60 divisors (see below), whose sum is σ = 2216376. Its totient is φ = 297600.

The previous prime is 845659. The next prime is 845683. The reversal of 845680 is 86548.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (845683) by changing a digit.

845680 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 11 ways as a sum of consecutive naturals, for example, 27265 + ... + 27295.

2⁸⁴⁵⁶⁸⁰ is an apocalyptic number.

845680 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 845680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1108188).

845680 is an abundant number, since it is smaller than the sum of its proper divisors (1370696).

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

845680 is a wasteful number, since it uses less digits than its factorization.

845680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86 (or 49 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 845680 is about 919.6086123999. The cubic root of 845680 is about 94.5660726954.

The spelling of 845680 in words is "eight hundred forty-five thousand, six hundred eighty".