Search a number
-
+
285788160 = 2113257443
BaseRepresentation
bin10001000010001…
…100100000000000
3201220202112122200
4101002030200000
51041130210120
644205233200
710040105430
oct2102144000
9656675580
10285788160
11137357969
127b862800
1347293128
1429d542c0
151a152e90
hex1108c800

285788160 has 288 divisors, whose sum is σ = 1134544320. Its totient is φ = 65175552.

The previous prime is 285788141. The next prime is 285788171. The reversal of 285788160 is 61887582.

It is a tau number, because it is divible by the number of its divisors (288).

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 644899 + ... + 645341.

It is an arithmetic number, because the mean of its divisors is an integer number (3939390).

Almost surely, 2285788160 is an apocalyptic number.

285788160 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 285788160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (567272160).

285788160 is an abundant number, since it is smaller than the sum of its proper divisors (848756160).

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

285788160 is a wasteful number, since it uses less digits than its factorization.

285788160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483 (or 460 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 45.

The square root of 285788160 is about 16905.2701841763. The cubic root of 285788160 is about 658.6905165646.

The spelling of 285788160 in words is "two hundred eighty-five million, seven hundred eighty-eight thousand, one hundred sixty".