205079240 has 32 divisors (see below), whose sum is σ = 467933760. Its totient is φ = 80875200.

The previous prime is 205079239. The next prime is 205079261. The reversal of 205079240 is 42970502.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33266 + ... + 38945.

It is an arithmetic number, because the mean of its divisors is an integer number (14622930).

Almost surely, 2^205079240 is an apocalyptic number.

205079240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205079240 is an abundant number, since it is smaller than the sum of its proper divisors (262854520).

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

205079240 is a wasteful number, since it uses less digits than its factorization.

205079240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72293 (or 72289 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 205079240 is about 14320.5879767557. The cubic root of 205079240 is about 589.7128162825.

The spelling of 205079240 in words is "two hundred five million, seventy-nine thousand, two hundred forty".