204555040 has 48 divisors (see below), whose sum is σ = 484323840. Its totient is φ = 81642240.

The previous prime is 204555023. The next prime is 204555049. The reversal of 204555040 is 40555402.

It is a junction number, because it is equal to n+sod(n) for n = 204554996 and 204555014.

It is not an unprimeable number, because it can be changed into a prime (204555049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90241 + ... + 92479.

It is an arithmetic number, because the mean of its divisors is an integer number (10090080).

Almost surely, 2^204555040 is an apocalyptic number.

204555040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204555040 is an abundant number, since it is smaller than the sum of its proper divisors (279768800).

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

204555040 is a wasteful number, since it uses less digits than its factorization.

204555040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2825 (or 2817 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 204555040 is about 14302.2739450760. The cubic root of 204555040 is about 589.2099355126.

The spelling of 204555040 in words is "two hundred four million, five hundred fifty-five thousand, forty".