285145224 has 128 divisors (see below), whose sum is σ = 884701440. Its totient is φ = 74575872.

The previous prime is 285145219. The next prime is 285145243. The reversal of 285145224 is 422541582.

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, 298732 + ... + 299684.

It is an arithmetic number, because the mean of its divisors is an integer number (6911730).

Almost surely, 2^285145224 is an apocalyptic number.

285145224 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 285145224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (442350720).

285145224 is an abundant number, since it is smaller than the sum of its proper divisors (599556216).

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

285145224 is a wasteful number, since it uses less digits than its factorization.

285145224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1119 (or 1115 counting only the distinct ones).

The product of its digits is 25600, while the sum is 33.

The square root of 285145224 is about 16886.2436320219. The cubic root of 285145224 is about 658.1961949172.

The spelling of 285145224 in words is "two hundred eighty-five million, one hundred forty-five thousand, two hundred twenty-four".