545408220 has 144 divisors (see below), whose sum is σ = 1838017440. Its totient is φ = 120347136.

The previous prime is 545408209. The next prime is 545408267. The reversal of 545408220 is 22804545.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 82062 + ... + 88458.

It is an arithmetic number, because the mean of its divisors is an integer number (12764010).

Almost surely, 2^545408220 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 545408220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (919008720).

545408220 is an abundant number, since it is smaller than the sum of its proper divisors (1292609220).

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

545408220 is a wasteful number, since it uses less digits than its factorization.

545408220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6452 (or 6443 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 30.

The square root of 545408220 is about 23353.9765350572. The cubic root of 545408220 is about 817.0348090781.

The spelling of 545408220 in words is "five hundred forty-five million, four hundred eight thousand, two hundred twenty".