845520 has 80 divisors (see below), whose sum is σ = 2833152. Its totient is φ = 207360.

The previous prime is 845491. The next prime is 845531. The reversal of 845520 is 25548.

845520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2985 + ... + 3255.

2⁸⁴⁵⁵²⁰ is an apocalyptic number.

845520 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 845520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1416576).

845520 is an abundant number, since it is smaller than the sum of its proper divisors (1987632).

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

845520 is a wasteful number, since it uses less digits than its factorization.

845520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300 (or 294 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 845520 is about 919.5216147541. The cubic root of 845520 is about 94.5601084512.

The spelling of 845520 in words is "eight hundred forty-five thousand, five hundred twenty".