285489312 has 48 divisors (see below), whose sum is σ = 756312480. Its totient is φ = 94286592.

The previous prime is 285489293. The next prime is 285489319. The reversal of 285489312 is 213984582.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (285489319) 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, 3178 + ... + 24105.

It is an arithmetic number, because the mean of its divisors is an integer number (15756510).

Almost surely, 2^285489312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 285489312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (378156240).

285489312 is an abundant number, since it is smaller than the sum of its proper divisors (470823168).

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

285489312 is a wasteful number, since it uses less digits than its factorization.

285489312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27405 (or 27397 counting only the distinct ones).

The product of its digits is 138240, while the sum is 42.

The square root of 285489312 is about 16896.4289718272. The cubic root of 285489312 is about 658.4608394523.

The spelling of 285489312 in words is "two hundred eighty-five million, four hundred eighty-nine thousand, three hundred twelve".