205138850 has 24 divisors (see below), whose sum is σ = 436067328. Its totient is φ = 70333200.

The previous prime is 205138849. The next prime is 205138861. The reversal of 205138850 is 58831502.

It is a happy number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 292706 + ... + 293405.

It is an arithmetic number, because the mean of its divisors is an integer number (18169472).

Almost surely, 2^205138850 is an apocalyptic number.

205138850 is an abundant number, since it is smaller than the sum of its proper divisors (230928478).

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

205138850 is a wasteful number, since it uses less digits than its factorization.

205138850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586130 (or 586125 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 205138850 is about 14322.6690948301. The cubic root of 205138850 is about 589.7699476554.

The spelling of 205138850 in words is "two hundred five million, one hundred thirty-eight thousand, eight hundred fifty".