205486728 has 32 divisors (see below), whose sum is σ = 514800960. Its totient is φ = 68351040.

The previous prime is 205486657. The next prime is 205486739. The reversal of 205486728 is 827684502.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 205486728.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2898 + ... + 20478.

It is an arithmetic number, because the mean of its divisors is an integer number (16087530).

Almost surely, 2^205486728 is an apocalyptic number.

It is an amenable number.

205486728 is an abundant number, since it is smaller than the sum of its proper divisors (309314232).

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

205486728 is a wasteful number, since it uses less digits than its factorization.

205486728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18077 (or 18073 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 42.

The square root of 205486728 is about 14334.8082651984. The cubic root of 205486728 is about 590.1031400650.

The spelling of 205486728 in words is "two hundred five million, four hundred eighty-six thousand, seven hundred twenty-eight".