205540760 has 16 divisors (see below), whose sum is σ = 462466800. Its totient is φ = 82216288.

The previous prime is 205540759. The next prime is 205540787. The reversal of 205540760 is 67045502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2569220 + ... + 2569299.

It is an arithmetic number, because the mean of its divisors is an integer number (28904175).

Almost surely, 2^205540760 is an apocalyptic number.

205540760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205540760 is an abundant number, since it is smaller than the sum of its proper divisors (256926040).

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

205540760 is a wasteful number, since it uses less digits than its factorization.

205540760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5138530 (or 5138526 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 205540760 is about 14336.6927845999. The cubic root of 205540760 is about 590.1548573688.

The spelling of 205540760 in words is "two hundred five million, five hundred forty thousand, seven hundred sixty".