204055440 has 160 divisors (see below), whose sum is σ = 676087680. Its totient is φ = 50761728.

The previous prime is 204055429. The next prime is 204055441. The reversal of 204055440 is 44550402.

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

It is a self number, because there is not a number n which added to its sum of digits gives 204055440.

It is not an unprimeable number, because it can be changed into a prime (204055441) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 332574 + ... + 333186.

It is an arithmetic number, because the mean of its divisors is an integer number (4225548).

Almost surely, 2^204055440 is an apocalyptic number.

204055440 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 204055440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (338043840).

204055440 is an abundant number, since it is smaller than the sum of its proper divisors (472032240).

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

204055440 is a wasteful number, since it uses less digits than its factorization.

204055440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721 (or 715 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 204055440 is about 14284.7975134406. The cubic root of 204055440 is about 588.7298540264.

The spelling of 204055440 in words is "two hundred four million, fifty-five thousand, four hundred forty".