545323540 has 48 divisors (see below), whose sum is σ = 1188205200. Its totient is φ = 209979392.

The previous prime is 545323517. The next prime is 545323547. The reversal of 545323540 is 45323545.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 6990736 + 538332804 = 2644^2 + 23202^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545323547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 224412 + ... + 226828.

It is an arithmetic number, because the mean of its divisors is an integer number (24754275).

Almost surely, 2^545323540 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 545323540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (594102600).

545323540 is an abundant number, since it is smaller than the sum of its proper divisors (642881660).

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

545323540 is a wasteful number, since it uses less digits than its factorization.

545323540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2844 (or 2842 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 31.

The square root of 545323540 is about 23352.1634972009. The cubic root of 545323540 is about 816.9925226548.

The spelling of 545323540 in words is "five hundred forty-five million, three hundred twenty-three thousand, five hundred forty".