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191130 = 23523277
BaseRepresentation
bin101110101010011010
3100201011220
4232222122
522104010
64032510
71424142
oct565232
9321156
10191130
11120665
1292736
1368cc4
144d922
153b970
hex2ea9a

191130 has 32 divisors (see below), whose sum is σ = 480384. Its totient is φ = 48576.

The previous prime is 191123. The next prime is 191137. The reversal of 191130 is 31191.

It is an interprime number because it is at equal distance from previous prime (191123) and next prime (191137).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 552 + ... + 828.

It is an arithmetic number, because the mean of its divisors is an integer number (15012).

2191130 is an apocalyptic number.

191130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 191130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (240192).

191130 is an abundant number, since it is smaller than the sum of its proper divisors (289254).

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

191130 is a wasteful number, since it uses less digits than its factorization.

191130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310.

The product of its (nonzero) digits is 27, while the sum is 15.

The square root of 191130 is about 437.1841717171. The cubic root of 191130 is about 57.6027149569.

The spelling of 191130 in words is "one hundred ninety-one thousand, one hundred thirty".

Divisors: 1 2 3 5 6 10 15 23 30 46 69 115 138 230 277 345 554 690 831 1385 1662 2770 4155 6371 8310 12742 19113 31855 38226 63710 95565 191130