205379904 has 28 divisors (see below), whose sum is σ = 543401504. Its totient is φ = 68459904.

The previous prime is 205379897. The next prime is 205379921. The reversal of 205379904 is 409973502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 534652 + ... + 535035.

Almost surely, 2^205379904 is an apocalyptic number.

205379904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

205379904 is an abundant number, since it is smaller than the sum of its proper divisors (338021600).

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

205379904 is a wasteful number, since it uses less digits than its factorization.

205379904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069702 (or 1069692 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 39.

The square root of 205379904 is about 14331.0817456325. The cubic root of 205379904 is about 590.0008656504. Note that the first 3 decimals are identical.

The spelling of 205379904 in words is "two hundred five million, three hundred seventy-nine thousand, nine hundred four".