545780 has 24 divisors (see below), whose sum is σ = 1186920. Its totient is φ = 210560.

The previous prime is 545773. The next prime is 545789. The reversal of 545780 is 87545.

545780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 80656 + 465124 = 284^2 + 682^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110 + ... + 1050.

It is an arithmetic number, because the mean of its divisors is an integer number (49455).

2⁵⁴⁵⁷⁸⁰ 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 545780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (593460).

545780 is an abundant number, since it is smaller than the sum of its proper divisors (641140).

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

545780 is a wasteful number, since it uses less digits than its factorization.

545780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979 (or 977 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 545780 is about 738.7692467882. The cubic root of 545780 is about 81.7220412080.

The spelling of 545780 in words is "five hundred forty-five thousand, seven hundred eighty".