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18938112 = 28324659
BaseRepresentation
bin100100000111…
…1100100000000
31022122011012120
41020033210000
514322004422
61513524240
7316654104
oct110174400
938564176
1018938112
11a765536
126413680
133c00cab
14272d904
1519e145c
hex120f900

18938112 has 36 divisors (see below), whose sum is σ = 50405040. Its totient is φ = 6312448.

The previous prime is 18938107. The next prime is 18938123. The reversal of 18938112 is 21183981.

It is a super-2 number, since 2×189381122 = 717304172249088, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11562 + ... + 13097.

It is an arithmetic number, because the mean of its divisors is an integer number (1400140).

Almost surely, 218938112 is an apocalyptic number.

18938112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18938112 is an abundant number, since it is smaller than the sum of its proper divisors (31466928).

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

18938112 is an equidigital number, since it uses as much as digits as its factorization.

18938112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24678 (or 24664 counting only the distinct ones).

The product of its digits is 3456, while the sum is 33.

The square root of 18938112 is about 4351.7941127769. The cubic root of 18938112 is about 266.5501268545.

The spelling of 18938112 in words is "eighteen million, nine hundred thirty-eight thousand, one hundred twelve".

Divisors: 1 2 3 4 6 8 12 16 24 32 48 64 96 128 192 256 384 768 24659 49318 73977 98636 147954 197272 295908 394544 591816 789088 1183632 1578176 2367264 3156352 4734528 6312704 9469056 18938112