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18308060 = 2257112893
BaseRepresentation
bin100010111010…
…1101111011100
31021110010221022
41011311233130
514141324220
61452223312
7311421161
oct105655734
937403838
1018308060
11a375131
12616ab38
133a40294
142608068
151919925
hex1175bdc

18308060 has 24 divisors (see below), whose sum is σ = 38991456. Its totient is φ = 7219520.

The previous prime is 18308053. The next prime is 18308063. The reversal of 18308060 is 6080381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18308063) 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, 5027 + ... + 7866.

It is an arithmetic number, because the mean of its divisors is an integer number (1624644).

Almost surely, 218308060 is an apocalyptic number.

18308060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18308060 is an abundant number, since it is smaller than the sum of its proper divisors (20683396).

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

18308060 is a wasteful number, since it uses less digits than its factorization.

18308060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12973 (or 12971 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 18308060 is about 4278.7918855677. The cubic root of 18308060 is about 263.5607748561.

The spelling of 18308060 in words is "eighteen million, three hundred eight thousand, sixty".

Divisors: 1 2 4 5 10 20 71 142 284 355 710 1420 12893 25786 51572 64465 128930 257860 915403 1830806 3661612 4577015 9154030 18308060