205404900 has 36 divisors (see below), whose sum is σ = 594305712. Its totient is φ = 54774560.

The previous prime is 205404889. The next prime is 205404911. The reversal of 205404900 is 9404502.

It is an interprime number because it is at equal distance from previous prime (205404889) and next prime (205404911).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 342042 + ... + 342641.

It is an arithmetic number, because the mean of its divisors is an integer number (16508492).

Almost surely, 2^205404900 is an apocalyptic number.

205404900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205404900 is an abundant number, since it is smaller than the sum of its proper divisors (388900812).

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

205404900 is a wasteful number, since it uses less digits than its factorization.

205404900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684700 (or 684693 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 205404900 is about 14331.9538095823. The cubic root of 205404900 is about 590.0248002598.

The spelling of 205404900 in words is "two hundred five million, four hundred four thousand, nine hundred".