285280460 has 48 divisors (see below), whose sum is σ = 617555232. Its totient is φ = 110630400.

The previous prime is 285280433. The next prime is 285280483. The reversal of 285280460 is 64082582.

It is a self number, because there is not a number n which added to its sum of digits gives 285280460.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140855 + ... + 142865.

It is an arithmetic number, because the mean of its divisors is an integer number (12865734).

Almost surely, 2^285280460 is an apocalyptic number.

285280460 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 285280460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (308777616).

285280460 is an abundant number, since it is smaller than the sum of its proper divisors (332274772).

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

285280460 is a wasteful number, since it uses less digits than its factorization.

285280460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2234 (or 2232 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 35.

The square root of 285280460 is about 16890.2474819051. The cubic root of 285280460 is about 658.3002328423.

The spelling of 285280460 in words is "two hundred eighty-five million, two hundred eighty thousand, four hundred sixty".