Search a number
30178 = 279191
BaseRepresentation
bin111010111100010
31112101201
413113202
51431203
6351414
7153661
oct72742
945351
1030178
1120745
121556a
1310975
158e1d
hex75e2

30178 has 8 divisors (see below), whose sum is σ = 46080. Its totient is φ = 14820.

The previous prime is 30169. The next prime is 30181. The reversal of 30178 is 87103.

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

It is an Ulam number.

It is a plaindrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63 + ... + 253.

It is an arithmetic number, because the mean of its divisors is an integer number (5760).

230178 is an apocalyptic number.

30178 is a deficient number, since it is larger than the sum of its proper divisors (15902).

30178 is a wasteful number, since it uses less digits than its factorization.

30178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 30178 is about 173.7181625507. The cubic root of 30178 is about 31.1336580699.

It can be divided in two parts, 3017 and 8, that added together give a square (3025 = 552).

The spelling of 30178 in words is "thirty thousand, one hundred seventy-eight".

Divisors: 1 2 79 158 191 382 15089 30178