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83188 = 2272971
BaseRepresentation
bin10100010011110100
311020010001
4110103310
510130223
61441044
7464350
oct242364
9136101
1083188
1157556
1240184
132bb31
1422460
15199ad
hex144f4

83188 has 12 divisors (see below), whose sum is σ = 166432. Its totient is φ = 35640.

The previous prime is 83177. The next prime is 83203. The reversal of 83188 is 88138.

83188 is an admirable number.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 2971 = 83188 / (8 + 3 + 1 + 8 + 8).

It is an Ulam number.

It is a plaindrome in base 15.

It is a congruent number.

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, 1458 + ... + 1513.

283188 is an apocalyptic number.

It is an amenable number.

83188 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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 (83216).

83188 is a wasteful number, since it uses less digits than its factorization.

83188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2982 (or 2980 counting only the distinct ones).

The product of its digits is 1536, while the sum is 28.

The square root of 83188 is about 288.4233000297. The cubic root of 83188 is about 43.6536163891.

Subtracting 83188 from its reverse (88138), we obtain a triangular number (4950 = T99).

It can be divided in two parts, 831 and 88, that added together give a palindrome (919).

The spelling of 83188 in words is "eighty-three thousand, one hundred eighty-eight".

Divisors: 1 2 4 7 14 28 2971 5942 11884 20797 41594 83188