205012770 has 32 divisors (see below), whose sum is σ = 492754752. Its totient is φ = 54589632.

The previous prime is 205012723. The next prime is 205012771. The reversal of 205012770 is 77210502.

It is a self number, because there is not a number n which added to its sum of digits gives 205012770.

It is not an unprimeable number, because it can be changed into a prime (205012771) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 17329 + ... + 26651.

It is an arithmetic number, because the mean of its divisors is an integer number (15398586).

Almost surely, 2^205012770 is an apocalyptic number.

205012770 is an abundant number, since it is smaller than the sum of its proper divisors (287741982).

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

205012770 is a wasteful number, since it uses less digits than its factorization.

205012770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10066.

The product of its (nonzero) digits is 980, while the sum is 24.

The square root of 205012770 is about 14318.2670040756. The cubic root of 205012770 is about 589.6490970967.

The spelling of 205012770 in words is "two hundred five million, twelve thousand, seven hundred seventy".