285605136 has 80 divisors (see below), whose sum is σ = 823657600. Its totient is φ = 94753152.

The previous prime is 285605129. The next prime is 285605143. The reversal of 285605136 is 631506582.

285605136 is a `hidden beast` number, since 2 + 85 + 60 + 513 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (285605129) and next prime (285605143).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 285605136.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97485 + ... + 100371.

It is an arithmetic number, because the mean of its divisors is an integer number (10295720).

Almost surely, 2^285605136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 285605136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (411828800).

285605136 is an abundant number, since it is smaller than the sum of its proper divisors (538052464).

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

285605136 is a wasteful number, since it uses less digits than its factorization.

285605136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3133 (or 3121 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 285605136 is about 16899.8560940619. The cubic root of 285605136 is about 658.5498740251.

The spelling of 285605136 in words is "two hundred eighty-five million, six hundred five thousand, one hundred thirty-six".