285822864 has 80 divisors (see below), whose sum is σ = 822764800. Its totient is φ = 95001984.

The previous prime is 285822857. The next prime is 285822893. The reversal of 285822864 is 468228582.

285822864 is a `hidden beast` number, since 2 + 8 + 582 + 2 + 8 + 64 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199302 + ... + 200730.

It is an arithmetic number, because the mean of its divisors is an integer number (10284560).

Almost surely, 2^285822864 is an apocalyptic number.

285822864 is a gapful number since it is divisible by the number (24) 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 285822864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (411382400).

285822864 is an abundant number, since it is smaller than the sum of its proper divisors (536941936).

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

285822864 is a wasteful number, since it uses less digits than its factorization.

285822864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1909 (or 1897 counting only the distinct ones).

The product of its digits is 491520, while the sum is 45.

The square root of 285822864 is about 16906.2965784941. The cubic root of 285822864 is about 658.7171776533.

The spelling of 285822864 in words is "two hundred eighty-five million, eight hundred twenty-two thousand, eight hundred sixty-four".