285285560 has 128 divisors (see below), whose sum is σ = 790732800. Its totient is φ = 90478080.

The previous prime is 285285547. The next prime is 285285601. The reversal of 285285560 is 65582582.

285285560 = T₆₁₆₀ + T₆₁₆₁ + ... + T₆₁₇₄.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 198926 + ... + 200354.

It is an arithmetic number, because the mean of its divisors is an integer number (6177600).

Almost surely, 2^285285560 is an apocalyptic number.

285285560 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 285285560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (395366400).

285285560 is an abundant number, since it is smaller than the sum of its proper divisors (505447240).

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

285285560 is a wasteful number, since it uses less digits than its factorization.

285285560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1501 (or 1497 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 41.

The square root of 285285560 is about 16890.3984559276. The cubic root of 285285560 is about 658.3041556618.

The spelling of 285285560 in words is "two hundred eighty-five million, two hundred eighty-five thousand, five hundred sixty".