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30842 = 272203
BaseRepresentation
bin111100001111010
31120022022
413201322
51441332
6354442
7155630
oct74172
946268
1030842
1121199
1215a22
1311066
14b350
159212
hex787a

30842 has 8 divisors (see below), whose sum is σ = 52896. Its totient is φ = 13212.

The previous prime is 30841. The next prime is 30851. The reversal of 30842 is 24803.

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

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 30842.

It is not an unprimeable number, because it can be changed into a prime (30841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1088 + ... + 1115.

It is an arithmetic number, because the mean of its divisors is an integer number (6612).

230842 is an apocalyptic number.

30842 is a deficient number, since it is larger than the sum of its proper divisors (22054).

30842 is a wasteful number, since it uses less digits than its factorization.

30842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2212.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 30842 is about 175.6189055882. The cubic root of 30842 is about 31.3603459024.

The spelling of 30842 in words is "thirty thousand, eight hundred forty-two".

Divisors: 1 2 7 14 2203 4406 15421 30842