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18050284 = 227644653
BaseRepresentation
bin100010011011…
…0110011101100
31020222001100001
41010312303230
514110102114
61442514044
7306265510
oct104666354
936861301
1018050284
11a20949a
126065924
13397cb55
14257c140
1518b8374
hex1136cec

18050284 has 12 divisors (see below), whose sum is σ = 36100624. Its totient is φ = 7735824.

The previous prime is 18050261. The next prime is 18050287. The reversal of 18050284 is 48205081.

18050284 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 644653 = 18050284 / (1 + 8 + 0 + 5 + 0 + 2 + 8 + 4).

It is not an unprimeable number, because it can be changed into a prime (18050287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322299 + ... + 322354.

Almost surely, 218050284 is an apocalyptic number.

18050284 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18050284 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18050284 is a wasteful number, since it uses less digits than its factorization.

18050284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644664 (or 644662 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 18050284 is about 4248.5625804500. The cubic root of 18050284 is about 262.3179520829.

The spelling of 18050284 in words is "eighteen million, fifty thousand, two hundred eighty-four".

Divisors: 1 2 4 7 14 28 644653 1289306 2578612 4512571 9025142 18050284