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18888 = 233787
BaseRepresentation
bin100100111001000
3221220120
410213020
51101023
6223240
7106032
oct44710
927816
1018888
1113211
12ab20
13879c
146c52
1558e3
hex49c8

18888 has 16 divisors (see below), whose sum is σ = 47280. Its totient is φ = 6288.

The previous prime is 18869. The next prime is 18899. The reversal of 18888 is 88881.

It can be divided in two parts, 188 and 88, that added together give a triangular number (276 = T23).

It is a nude number because it is divisible by every one of its digits.

It is a plaindrome in base 10.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 18888.

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, 370 + ... + 417.

It is an arithmetic number, because the mean of its divisors is an integer number (2955).

218888 is an apocalyptic number.

It is an amenable number.

18888 is an abundant number, since it is smaller than the sum of its proper divisors (28392).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23640).

18888 is a wasteful number, since it uses less digits than its factorization.

18888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796 (or 792 counting only the distinct ones).

The product of its digits is 4096, while the sum is 33.

The square root of 18888 is about 137.4336203409. The cubic root of 18888 is about 26.6314813730.

The spelling of 18888 in words is "eighteen thousand, eight hundred eighty-eight".

Divisors: 1 2 3 4 6 8 12 24 787 1574 2361 3148 4722 6296 9444 18888