205426880 has 28 divisors (see below), whose sum is σ = 489173520. Its totient is φ = 82170624.

The previous prime is 205426873. The next prime is 205426883. The reversal of 205426880 is 88624502.

It is a self number, because there is not a number n which added to its sum of digits gives 205426880.

It is not an unprimeable number, because it can be changed into a prime (205426883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320660 + ... + 321299.

Almost surely, 2^205426880 is an apocalyptic number.

205426880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205426880 is an abundant number, since it is smaller than the sum of its proper divisors (283746640).

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

205426880 is an equidigital number, since it uses as much as digits as its factorization.

205426880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641976 (or 641966 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 35.

The square root of 205426880 is about 14332.7206070585. The cubic root of 205426880 is about 590.0458453315.

The spelling of 205426880 in words is "two hundred five million, four hundred twenty-six thousand, eight hundred eighty".