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18392 = 2311219
BaseRepresentation
bin100011111011000
3221020012
410133120
51042032
6221052
7104423
oct43730
927205
1018392
1112900
12a788
1384aa
1469ba
1556b2
hex47d8

18392 has 24 divisors (see below), whose sum is σ = 39900. Its totient is φ = 7920.

The previous prime is 18379. The next prime is 18397. The reversal of 18392 is 29381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18397) by changing a digit.

18392 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 959 + ... + 977.

218392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19950).

18392 is an abundant number, since it is smaller than the sum of its proper divisors (21508).

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

18392 is a wasteful number, since it uses less digits than its factorization.

18392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47 (or 32 counting only the distinct ones).

The product of its digits is 432, while the sum is 23.

The square root of 18392 is about 135.6171080653. The cubic root of 18392 is about 26.3962957766.

It can be divided in two parts, 183 and 92, that multiplied together give a triangular number (16836 = T183).

The spelling of 18392 in words is "eighteen thousand, three hundred ninety-two".

Divisors: 1 2 4 8 11 19 22 38 44 76 88 121 152 209 242 418 484 836 968 1672 2299 4598 9196 18392