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18067028 = 2272712381
BaseRepresentation
bin100010011101…
…0111001010100
31020222220022012
41010322321110
514111121103
61443123352
7306365360
oct104727124
936886265
1018067028
11a220031
126073558
133987665
1425842a0
1518bd2d8
hex113ae54

18067028 has 24 divisors (see below), whose sum is σ = 36282624. Its totient is φ = 7711200.

The previous prime is 18067013. The next prime is 18067031. The reversal of 18067028 is 82076081.

It is a junction number, because it is equal to n+sod(n) for n = 18066985 and 18067003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6398 + ... + 8778.

It is an arithmetic number, because the mean of its divisors is an integer number (1511776).

Almost surely, 218067028 is an apocalyptic number.

It is an amenable number.

18067028 is an abundant number, since it is smaller than the sum of its proper divisors (18215596).

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

18067028 is a wasteful number, since it uses less digits than its factorization.

18067028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2663 (or 2661 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 18067028 is about 4250.5326725012. The cubic root of 18067028 is about 262.3990384223.

The spelling of 18067028 in words is "eighteen million, sixty-seven thousand, twenty-eight".

Divisors: 1 2 4 7 14 28 271 542 1084 1897 2381 3794 4762 7588 9524 16667 33334 66668 645251 1290502 2581004 4516757 9033514 18067028