204544540 has 48 divisors (see below), whose sum is σ = 450535680. Its totient is φ = 77898240.

The previous prime is 204544537. The next prime is 204544559. The reversal of 204544540 is 45445402.

It is a junction number, because it is equal to n+sod(n) for n = 204544499 and 204544508.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39925 + ... + 44755.

It is an arithmetic number, because the mean of its divisors is an integer number (9386160).

Almost surely, 2^204544540 is an apocalyptic number.

204544540 is a gapful number since it is divisible by the number (20) 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 204544540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225267840).

204544540 is an abundant number, since it is smaller than the sum of its proper divisors (245991140).

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

204544540 is a wasteful number, since it uses less digits than its factorization.

204544540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4942 (or 4940 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 28.

The square root of 204544540 is about 14301.9068658693. The cubic root of 204544540 is about 589.1998537759.

Adding to 204544540 its reverse (45445402), we get a palindrome (249989942).

The spelling of 204544540 in words is "two hundred four million, five hundred forty-four thousand, five hundred forty".