205061890 has 32 divisors (see below), whose sum is σ = 403258176. Its totient is φ = 74458560.

The previous prime is 205061887. The next prime is 205061903. The reversal of 205061890 is 98160502.

205061890 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140404 + ... + 141856.

It is an arithmetic number, because the mean of its divisors is an integer number (12601818).

Almost surely, 2^205061890 is an apocalyptic number.

205061890 is a deficient number, since it is larger than the sum of its proper divisors (198196286).

205061890 is a wasteful number, since it uses less digits than its factorization.

205061890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2754.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 205061890 is about 14319.9821927264. The cubic root of 205061890 is about 589.6961856281.

The spelling of 205061890 in words is "two hundred five million, sixty-one thousand, eight hundred ninety".