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30668 = 22111741
BaseRepresentation
bin111011111001100
31120001212
413133030
51440133
6353552
7155261
oct73714
946055
1030668
1121050
12158b8
1310c61
14b268
159148
hex77cc

30668 has 24 divisors (see below), whose sum is σ = 63504. Its totient is φ = 12800.

The previous prime is 30661. The next prime is 30671. The reversal of 30668 is 86603.

It is a plaindrome in base 16.

It is a zygodrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (30661) by changing a digit.

30668 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 7 ways as a sum of consecutive naturals, for example, 728 + ... + 768.

It is an arithmetic number, because the mean of its divisors is an integer number (2646).

230668 is an apocalyptic number.

It is an amenable number.

30668 is an abundant number, since it is smaller than the sum of its proper divisors (32836).

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 (31752).

30668 is a wasteful number, since it uses less digits than its factorization.

30668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73 (or 71 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 30668 is about 175.1228140477. The cubic root of 30668 is about 31.3012598716.

The spelling of 30668 in words is "thirty thousand, six hundred sixty-eight".

Divisors: 1 2 4 11 17 22 34 41 44 68 82 164 187 374 451 697 748 902 1394 1804 2788 7667 15334 30668