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230686190 = 25731106307
BaseRepresentation
bin11011011111111…
…11110111101110
3121002002001221222
431233333313232
5433023424230
634520223342
75500541330
oct1557776756
9532061858
10230686190
11109241a49
126530ab52
1338a3c707
14228cd450
15153bb6e5
hexdbffdee

230686190 has 32 divisors (see below), whose sum is σ = 489867264. Its totient is φ = 76540320.

The previous prime is 230686189. The next prime is 230686193. The reversal of 230686190 is 91686032.

It is a super-2 number, since 2×2306861902 = 106432236513432200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 230686190.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230686193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50984 + ... + 55323.

It is an arithmetic number, because the mean of its divisors is an integer number (15308352).

Almost surely, 2230686190 is an apocalyptic number.

230686190 is an abundant number, since it is smaller than the sum of its proper divisors (259181074).

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

230686190 is a wasteful number, since it uses less digits than its factorization.

230686190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106352.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 230686190 is about 15188.3570540069. The cubic root of 230686190 is about 613.3012720192.

The spelling of 230686190 in words is "two hundred thirty million, six hundred eighty-six thousand, one hundred ninety".

Divisors: 1 2 5 7 10 14 31 35 62 70 155 217 310 434 1085 2170 106307 212614 531535 744149 1063070 1488298 3295517 3720745 6591034 7441490 16477585 23068619 32955170 46137238 115343095 230686190