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30140 = 22511137
BaseRepresentation
bin111010110111100
31112100022
413112330
51431030
6351312
7153605
oct72674
945308
1030140
1120710
1215538
1310946
14adac
158de5
hex75bc

30140 has 24 divisors (see below), whose sum is σ = 69552. Its totient is φ = 10880.

The previous prime is 30139. The next prime is 30161. The reversal of 30140 is 4103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152 + ... + 288.

It is an arithmetic number, because the mean of its divisors is an integer number (2898).

230140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34776).

30140 is an abundant number, since it is smaller than the sum of its proper divisors (39412).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30140 is a wasteful number, since it uses less digits than its factorization.

30140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 155 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 8.

The square root of 30140 is about 173.6087555396. The cubic root of 30140 is about 31.1205847944.

Adding to 30140 its reverse (4103), we get a palindrome (34243).

The spelling of 30140 in words is "thirty thousand, one hundred forty".

Divisors: 1 2 4 5 10 11 20 22 44 55 110 137 220 274 548 685 1370 1507 2740 3014 6028 7535 15070 30140