285828280 has 16 divisors (see below), whose sum is σ = 643113720. Its totient is φ = 114331296.

The previous prime is 285828269. The next prime is 285828281. The reversal of 285828280 is 82828582.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285828281) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3572814 + ... + 3572893.

Almost surely, 2^285828280 is an apocalyptic number.

285828280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285828280 is an abundant number, since it is smaller than the sum of its proper divisors (357285440).

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

285828280 is a wasteful number, since it uses less digits than its factorization.

285828280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7145718 (or 7145714 counting only the distinct ones).

The product of its (nonzero) digits is 163840, while the sum is 43.

The square root of 285828280 is about 16906.4567547431. The cubic root of 285828280 is about 658.7213382602.

The spelling of 285828280 in words is "two hundred eighty-five million, eight hundred twenty-eight thousand, two hundred eighty".