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30678 = 235113
BaseRepresentation
bin111011111010110
31120002020
413133112
51440203
6354010
7155304
oct73726
946066
1030678
112105a
1215906
1310c6b
14b274
159153
hex77d6

30678 has 8 divisors (see below), whose sum is σ = 61368. Its totient is φ = 10224.

The previous prime is 30677. The next prime is 30689. The reversal of 30678 is 87603.

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

30678 is an admirable number.

It is a super-2 number, since 2×306782 = 1882279368, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2551 + ... + 2562.

It is an arithmetic number, because the mean of its divisors is an integer number (7671).

230678 is an apocalyptic number.

30678 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 (30684).

30678 is a wasteful number, since it uses less digits than its factorization.

30678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5118.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 30678 is about 175.1513631120. The cubic root of 30678 is about 31.3046616649.

The spelling of 30678 in words is "thirty thousand, six hundred seventy-eight".

Divisors: 1 2 3 6 5113 10226 15339 30678