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30188 = 227547
BaseRepresentation
bin111010111101100
31112102002
413113230
51431223
6351432
7154004
oct72754
945362
1030188
1120754
1215578
1310982
14b004
158e28
hex75ec

30188 has 6 divisors (see below), whose sum is σ = 52836. Its totient is φ = 15092.

The previous prime is 30187. The next prime is 30197. The reversal of 30188 is 88103.

It is a super-2 number, since 2×301882 = 1822630688, which contains 22 as substring.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (30181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3770 + ... + 3777.

It is an arithmetic number, because the mean of its divisors is an integer number (8806).

230188 is an apocalyptic number.

It is an amenable number.

30188 is a deficient number, since it is larger than the sum of its proper divisors (22648).

30188 is a wasteful number, since it uses less digits than its factorization.

30188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7551 (or 7549 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 30188 is about 173.7469424191. The cubic root of 30188 is about 31.1370965814.

The spelling of 30188 in words is "thirty thousand, one hundred eighty-eight".

Divisors: 1 2 4 7547 15094 30188