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30085 = 511547
BaseRepresentation
bin111010110000101
31112021021
413112011
51430320
6351141
7153466
oct72605
945237
1030085
1120670
12154b1
1310903
14ad6d
158daa
hex7585

30085 has 8 divisors (see below), whose sum is σ = 39456. Its totient is φ = 21840.

The previous prime is 30071. The next prime is 30089. The reversal of 30085 is 58003.

Adding to 30085 its reverse (58003), we get a palindrome (88088).

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

It is not a de Polignac number, because 30085 - 29 = 29573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219 + ... + 328.

It is an arithmetic number, because the mean of its divisors is an integer number (4932).

230085 is an apocalyptic number.

30085 is the 110-th heptagonal number.

It is an amenable number.

30085 is a deficient number, since it is larger than the sum of its proper divisors (9371).

30085 is a wasteful number, since it uses less digits than its factorization.

30085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 30085 is about 173.4502810606. The cubic root of 30085 is about 31.1016434721.

The spelling of 30085 in words is "thirty thousand, eighty-five".

Divisors: 1 5 11 55 547 2735 6017 30085