204839540 has 12 divisors (see below), whose sum is σ = 430163076. Its totient is φ = 81935808.

The previous prime is 204839539. The next prime is 204839543. The reversal of 204839540 is 45938402.

204839540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 42328036 + 162511504 = 6506^2 + 12748^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 204839540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204839543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5120969 + ... + 5121008.

It is an arithmetic number, because the mean of its divisors is an integer number (35846923).

Almost surely, 2^204839540 is an apocalyptic number.

204839540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204839540 is an abundant number, since it is smaller than the sum of its proper divisors (225323536).

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

204839540 is a wasteful number, since it uses less digits than its factorization.

204839540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10241986 (or 10241984 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 204839540 is about 14312.2164600735. The cubic root of 204839540 is about 589.4829713533.

It can be divided in two parts, 204839 and 540, that added together give a cube (205379 = 59³).

The spelling of 204839540 in words is "two hundred four million, eight hundred thirty-nine thousand, five hundred forty".