Search a number
-
+
230118660 = 223251278437
BaseRepresentation
bin11011011011101…
…01010100000100
3121001000020110100
431231311110010
5432402244120
634500124100
75462655612
oct1555652404
9531006410
10230118660
11108994612
1265096630
13388a12b5
14227c26b2
1515308490
hexdb75504

230118660 has 36 divisors (see below), whose sum is σ = 698027148. Its totient is φ = 61364928.

The previous prime is 230118649. The next prime is 230118677. The reversal of 230118660 is 66811032.

230118660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 95883264 + 134235396 = 9792^2 + 11586^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 639039 + ... + 639398.

It is an arithmetic number, because the mean of its divisors is an integer number (19389643).

Almost surely, 2230118660 is an apocalyptic number.

230118660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

230118660 is an abundant number, since it is smaller than the sum of its proper divisors (467908488).

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

230118660 is a wasteful number, since it uses less digits than its factorization.

230118660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1278452 (or 1278447 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 230118660 is about 15169.6624880055. The cubic root of 230118660 is about 612.7979147707.

Adding to 230118660 its reverse (66811032), we get a palindrome (296929692).

Subtracting from 230118660 its reverse (66811032), we obtain a triangular number (163307628 = T18072).

The spelling of 230118660 in words is "two hundred thirty million, one hundred eighteen thousand, six hundred sixty".

Divisors: 1 2 3 4 5 6 9 10 12 15 18 20 30 36 45 60 90 180 1278437 2556874 3835311 5113748 6392185 7670622 11505933 12784370 15341244 19176555 23011866 25568740 38353110 46023732 57529665 76706220 115059330 230118660