285352280 has 32 divisors (see below), whose sum is σ = 642554640. Its totient is φ = 114049920.

The previous prime is 285352271. The next prime is 285352289. The reversal of 285352280 is 82253582.

It is an interprime number because it is at equal distance from previous prime (285352271) and next prime (285352289).

It is a self number, because there is not a number n which added to its sum of digits gives 285352280.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285352289) 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, 72770 + ... + 76590.

Almost surely, 2^285352280 is an apocalyptic number.

285352280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285352280 is an abundant number, since it is smaller than the sum of its proper divisors (357202360).

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

285352280 is a wasteful number, since it uses less digits than its factorization.

285352280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5699 (or 5695 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 35.

The square root of 285352280 is about 16892.3734270824. The cubic root of 285352280 is about 658.3554710639.

The spelling of 285352280 in words is "two hundred eighty-five million, three hundred fifty-two thousand, two hundred eighty".