205355940 has 24 divisors (see below), whose sum is σ = 574996800. Its totient is φ = 54761568.

The previous prime is 205355929. The next prime is 205355947. The reversal of 205355940 is 49553502.

It is not an unprimeable number, because it can be changed into a prime (205355947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1711240 + ... + 1711359.

It is an arithmetic number, because the mean of its divisors is an integer number (23958200).

Almost surely, 2^205355940 is an apocalyptic number.

205355940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205355940 is an abundant number, since it is smaller than the sum of its proper divisors (369640860).

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

205355940 is a wasteful number, since it uses less digits than its factorization.

205355940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3422611 (or 3422609 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 205355940 is about 14330.2456364153. The cubic root of 205355940 is about 589.9779173962.

The spelling of 205355940 in words is "two hundred five million, three hundred fifty-five thousand, nine hundred forty".