204542028 has 72 divisors (see below), whose sum is σ = 556526880. Its totient is φ = 63106560.

The previous prime is 204542027. The next prime is 204542029. The reversal of 204542028 is 820245402.

It is a happy number.

204542028 is a `hidden beast` number, since 2 + 0 + 454 + 202 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (204542027) and next prime (204542029).

It is a junction number, because it is equal to n+sod(n) for n = 204541992 and 204542010.

It is not an unprimeable number, because it can be changed into a prime (204542027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34593 + ... + 40071.

It is an arithmetic number, because the mean of its divisors is an integer number (7729540).

Almost surely, 2^204542028 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 204542028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278263440).

204542028 is an abundant number, since it is smaller than the sum of its proper divisors (351984852).

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

204542028 is a wasteful number, since it uses less digits than its factorization.

204542028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5567 (or 5562 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 204542028 is about 14301.8190451425. The cubic root of 204542028 is about 589.1974417892.

The spelling of 204542028 in words is "two hundred four million, five hundred forty-two thousand, twenty-eight".