285308244 has 144 divisors (see below), whose sum is σ = 819885248. Its totient is φ = 86220288.

The previous prime is 285308227. The next prime is 285308269. The reversal of 285308244 is 442803582.

285308244 is a `hidden beast` number, since 2 + 8 + 530 + 82 + 44 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 285308199 and 285308208.

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 846444 + ... + 846780.

Almost surely, 2^285308244 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 285308244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (409942624).

285308244 is an abundant number, since it is smaller than the sum of its proper divisors (534577004).

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

285308244 is a wasteful number, since it uses less digits than its factorization.

285308244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436 (or 422 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 36.

The square root of 285308244 is about 16891.0699483484. The cubic root of 285308244 is about 658.3216031808.

The spelling of 285308244 in words is "two hundred eighty-five million, three hundred eight thousand, two hundred forty-four".