285322280 has 32 divisors (see below), whose sum is σ = 657636840. Its totient is φ = 111344640.

The previous prime is 285322277. The next prime is 285322283. The reversal of 285322280 is 82223582.

It is an interprime number because it is at equal distance from previous prime (285322277) and next prime (285322283).

It can be written as a sum of positive squares in 4 ways, for example, as 174609796 + 110712484 = 13214^2 + 10522^2 .

It is not an unprimeable number, because it can be changed into a prime (285322283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85349 + ... + 88628.

Almost surely, 2^285322280 is an apocalyptic number.

285322280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285322280 is an abundant number, since it is smaller than the sum of its proper divisors (372314560).

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

285322280 is a wasteful number, since it uses less digits than its factorization.

285322280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174029 (or 174025 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 285322280 is about 16891.4854290557. The cubic root of 285322280 is about 658.3323985815.

The spelling of 285322280 in words is "two hundred eighty-five million, three hundred twenty-two thousand, two hundred eighty".