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30818 = 219811
BaseRepresentation
bin111100001100010
31120021102
413201202
51441233
6354402
7155564
oct74142
946242
1030818
1121177
1215a02
1311048
14b334
1591e8
hex7862

30818 has 8 divisors (see below), whose sum is σ = 48720. Its totient is φ = 14580.

The previous prime is 30817. The next prime is 30829. The reversal of 30818 is 81803.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 30818.

It is not an unprimeable number, because it can be changed into a prime (30817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 368 + ... + 443.

It is an arithmetic number, because the mean of its divisors is an integer number (6090).

230818 is an apocalyptic number.

30818 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

30818 is a deficient number, since it is larger than the sum of its proper divisors (17902).

30818 is a wasteful number, since it uses less digits than its factorization.

30818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832.

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

The square root of 30818 is about 175.5505625169. The cubic root of 30818 is about 31.3522093396.

It can be divided in two parts, 30 and 818, that added together give a palindrome (848).

The spelling of 30818 in words is "thirty thousand, eight hundred eighteen".

Divisors: 1 2 19 38 811 1622 15409 30818