285808680 has 96 divisors (see below), whose sum is σ = 932873760. Its totient is φ = 75888000.

The previous prime is 285808673. The next prime is 285808693. The reversal of 285808680 is 86808582.

285808680 is a `hidden beast` number, since 2 + 8 + 580 + 8 + 68 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 88779 + ... + 91941.

It is an arithmetic number, because the mean of its divisors is an integer number (9717435).

Almost surely, 2^285808680 is an apocalyptic number.

285808680 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 285808680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (466436880).

285808680 is an abundant number, since it is smaller than the sum of its proper divisors (647065080).

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

285808680 is a wasteful number, since it uses less digits than its factorization.

285808680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3431 (or 3424 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 45.

The square root of 285808680 is about 16905.8770846117. The cubic root of 285808680 is about 658.7062811621.

The spelling of 285808680 in words is "two hundred eighty-five million, eight hundred eight thousand, six hundred eighty".