204939040 has 24 divisors (see below), whose sum is σ = 484168860. Its totient is φ = 81975552.

The previous prime is 204939023. The next prime is 204939043. The reversal of 204939040 is 40939402.

It can be written as a sum of positive squares in 2 ways, for example, as 190771344 + 14167696 = 13812^2 + 3764^2 .

It is a super-2 number, since 2×204939040² = 84000020232243200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 204938993 and 204939011.

It is not an unprimeable number, because it can be changed into a prime (204939043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 640275 + ... + 640594.

Almost surely, 2^204939040 is an apocalyptic number.

204939040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204939040 is an abundant number, since it is smaller than the sum of its proper divisors (279229820).

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

204939040 is a wasteful number, since it uses less digits than its factorization.

204939040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280884 (or 1280876 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 204939040 is about 14315.6920894520. The cubic root of 204939040 is about 589.5784022473.

The spelling of 204939040 in words is "two hundred four million, nine hundred thirty-nine thousand, forty".