205632890 has 16 divisors (see below), whose sum is σ = 372843432. Its totient is φ = 81652224.

The previous prime is 205632863. The next prime is 205632929. The reversal of 205632890 is 98236502.

205632890 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 4 ways, for example, as 164429329 + 41203561 = 12823^2 + 6419^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 205632890.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73679 + ... + 76418.

Almost surely, 2^205632890 is an apocalyptic number.

205632890 is a deficient number, since it is larger than the sum of its proper divisors (167210542).

205632890 is a wasteful number, since it uses less digits than its factorization.

205632890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150241.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 205632890 is about 14339.9055087542. The cubic root of 205632890 is about 590.2430196802.

The spelling of 205632890 in words is "two hundred five million, six hundred thirty-two thousand, eight hundred ninety".