285489360 has 200 divisors, whose sum is σ = 1068134760. Its totient is φ = 70253568.

The previous prime is 285489359. The next prime is 285489371. The reversal of 285489360 is 63984582.

285489360 is a `hidden beast` number, since 285 + 4 + 8 + 9 + 360 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 50296464 + 235192896 = 7092^2 + 15336^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 82546 + ... + 85934.

Almost surely, 2^285489360 is an apocalyptic number.

285489360 is a gapful number since it is divisible by the number (20) 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 285489360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (534067380).

285489360 is an abundant number, since it is smaller than the sum of its proper divisors (782645400).

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

285489360 is a wasteful number, since it uses less digits than its factorization.

285489360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3427 (or 3412 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 285489360 is about 16896.4303922456. The cubic root of 285489360 is about 658.4608763551.

The spelling of 285489360 in words is "two hundred eighty-five million, four hundred eighty-nine thousand, three hundred sixty".