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30306 = 235051

30306 has 8 divisors (see below), whose sum is σ = 60624. Its totient is φ = 10100.

The previous prime is 30293. The next prime is 30307. The reversal of 30306 is 60303.

It is a sphenic number, since it is the product of 3 distinct primes.

30306 is an admirable number.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 30291 and 30300.

It is not an unprimeable number, because it can be changed into a prime (30307) by changing a digit.

30306 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 3 ways as a sum of consecutive naturals, for example, 2520 + ... + 2531.

It is an arithmetic number, because the mean of its divisors is an integer number (7578).

230306 is an apocalyptic number.

30306 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 (30312).

30306 is a wasteful number, since it uses less digits than its factorization.

30306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5056.

The product of its (nonzero) digits is 54, while the sum is 12.

The square root of 30306 is about 174.0861855519. The cubic root of 30306 is about 31.1776137904.

Adding to 30306 its reverse (60303), we get a palindrome (90609).

It can be divided in two parts, 30 and 306, that multiplied together give a triangular number (9180 = T135).

The spelling of 30306 in words is "thirty thousand, three hundred six".

Divisors: 1 2 3 6 5051 10102 15153 30306