205748985 has 32 divisors (see below), whose sum is σ = 355759488. Its totient is φ = 100938240.

The previous prime is 205748981. The next prime is 205748987. The reversal of 205748985 is 589847502.

It is not a de Polignac number, because 205748985 - 2² = 205748981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205748981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59350 + ... + 62720.

It is an arithmetic number, because the mean of its divisors is an integer number (11117484).

Almost surely, 2^205748985 is an apocalyptic number.

It is an amenable number.

205748985 is a deficient number, since it is larger than the sum of its proper divisors (150010503).

205748985 is a wasteful number, since it uses less digits than its factorization.

205748985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3705.

The product of its (nonzero) digits is 806400, while the sum is 48.

The square root of 205748985 is about 14343.9529070616. The cubic root of 205748985 is about 590.3540774196.

The spelling of 205748985 in words is "two hundred five million, seven hundred forty-eight thousand, nine hundred eighty-five".