285385560 has 64 divisors (see below), whose sum is σ = 857368800. Its totient is φ = 75995136.

The previous prime is 285385553. The next prime is 285385577. The reversal of 285385560 is 65583582.

It is a congruent number.

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, 119902 + ... + 122258.

Almost surely, 2^285385560 is an apocalyptic number.

285385560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285385560 is an abundant number, since it is smaller than the sum of its proper divisors (571983240).

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

285385560 is a wasteful number, since it uses less digits than its factorization.

285385560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3380 (or 3376 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 42.

The square root of 285385560 is about 16893.3584582818. The cubic root of 285385560 is about 658.3810642457.

The spelling of 285385560 in words is "two hundred eighty-five million, three hundred eighty-five thousand, five hundred sixty".