204886540 has 24 divisors (see below), whose sum is σ = 431872560. Its totient is φ = 81647808.

The previous prime is 204886523. The next prime is 204886543. The reversal of 204886540 is 45688402.

It is a self number, because there is not a number n which added to its sum of digits gives 204886540.

It is not an unprimeable number, because it can be changed into a prime (204886543) 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 7 ways as a sum of consecutive naturals, for example, 13662 + ... + 24421.

It is an arithmetic number, because the mean of its divisors is an integer number (17994690).

Almost surely, 2^204886540 is an apocalyptic number.

204886540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204886540 is an abundant number, since it is smaller than the sum of its proper divisors (226986020).

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

204886540 is a wasteful number, since it uses less digits than its factorization.

204886540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38361 (or 38359 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 37.

The square root of 204886540 is about 14313.8583198242. The cubic root of 204886540 is about 589.5280531133.

It can be divided in two parts, 20488 and 6540, that added together give a triangular number (27028 = T₂₃₂).

The spelling of 204886540 in words is "two hundred four million, eight hundred eighty-six thousand, five hundred forty".