545280 has 80 divisors (see below), whose sum is σ = 1767744. Its totient is φ = 143360.

The previous prime is 545267. The next prime is 545291. The reversal of 545280 is 82545.

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

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

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 545280.

It is a congruent number.

It is an unprimeable number.

545280 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 7 ways as a sum of consecutive naturals, for example, 7645 + ... + 7715.

2⁵⁴⁵²⁸⁰ 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 545280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (883872).

545280 is an abundant number, since it is smaller than the sum of its proper divisors (1222464).

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

545280 is an equidigital number, since it uses as much as digits as its factorization.

545280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97 (or 81 counting only the distinct ones).

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

The square root of 545280 is about 738.4307685897. The cubic root of 545280 is about 81.6970778498.

The spelling of 545280 in words is "five hundred forty-five thousand, two hundred eighty".