205770656 has 48 divisors (see below), whose sum is σ = 498605184. Its totient is φ = 81402624.

The previous prime is 205770641. The next prime is 205770667. The reversal of 205770656 is 656077502.

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 7 ways as a sum of consecutive naturals, for example, 32420 + ... + 38243.

It is an arithmetic number, because the mean of its divisors is an integer number (10387608).

Almost surely, 2^205770656 is an apocalyptic number.

205770656 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

205770656 is an abundant number, since it is smaller than the sum of its proper divisors (292834528).

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

205770656 is a wasteful number, since it uses less digits than its factorization.

205770656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70693 (or 70685 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 38.

The square root of 205770656 is about 14344.7082926074. The cubic root of 205770656 is about 590.3748035065.

The spelling of 205770656 in words is "two hundred five million, seven hundred seventy thousand, six hundred fifty-six".