285605000 has 60 divisors (see below), whose sum is σ = 671984115. Its totient is φ = 113764000.

The previous prime is 285604993. The next prime is 285605027. The reversal of 285605000 is 506582.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 3 ways, for example, as 66031876 + 219573124 = 8126^2 + 14818^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=11950.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 1194881 + ... + 1195119.

Almost surely, 2^285605000 is an apocalyptic number.

285605000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 285605000

285605000 is an abundant number, since it is smaller than the sum of its proper divisors (386379115).

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

285605000 is an frugal number, since it uses more digits than its factorization.

285605000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504 (or 246 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 285605000 is about 16899.8520703585. The cubic root of 285605000 is about 658.5497694953.

The spelling of 285605000 in words is "two hundred eighty-five million, six hundred five thousand".