285066840 has 32 divisors (see below), whose sum is σ = 855200880. Its totient is φ = 76017792.

The previous prime is 285066811. The next prime is 285066841. The reversal of 285066840 is 48660582.

285066840 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285066841) 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, 1187659 + ... + 1187898.

Almost surely, 2^285066840 is an apocalyptic number.

285066840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285066840 is an abundant number, since it is smaller than the sum of its proper divisors (570134040).

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

285066840 is a wasteful number, since it uses less digits than its factorization.

285066840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2375571 (or 2375567 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 285066840 is about 16883.9225300284. The cubic root of 285066840 is about 658.1358785423.

The spelling of 285066840 in words is "two hundred eighty-five million, sixty-six thousand, eight hundred forty".