205640708 has 96 divisors (see below), whose sum is σ = 459486720. Its totient is φ = 78382080.

The previous prime is 205640693. The next prime is 205640719. The reversal of 205640708 is 807046502.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1886558 + ... + 1886666.

It is an arithmetic number, because the mean of its divisors is an integer number (4786320).

Almost surely, 2^205640708 is an apocalyptic number.

205640708 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 205640708, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229743360).

205640708 is an abundant number, since it is smaller than the sum of its proper divisors (253846012).

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

205640708 is a wasteful number, since it uses less digits than its factorization.

205640708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277 (or 275 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 205640708 is about 14340.1781021018. The cubic root of 205640708 is about 590.2504997764.

The spelling of 205640708 in words is "two hundred five million, six hundred forty thousand, seven hundred eight".