Search a number
-
+
1230310220 = 225611008451
BaseRepresentation
bin100100101010101…
…0000101101001100
310011202001020100012
41021111100231030
510004424411340
6322025452352
742326315156
oct11125205514
93152036305
101230310220
11581529307
122a40410b8
13167b77719
14b957dad6
1573026565
hex49550b4c

1230310220 has 24 divisors (see below), whose sum is σ = 2626009008. Its totient is φ = 484056000.

The previous prime is 1230310217. The next prime is 1230310241. The reversal of 1230310220 is 220130321.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1230310195 and 1230310204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 503006 + ... + 505445.

It is an arithmetic number, because the mean of its divisors is an integer number (109417042).

Almost surely, 21230310220 is an apocalyptic number.

1230310220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1230310220 is an abundant number, since it is smaller than the sum of its proper divisors (1395698788).

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

1230310220 is a wasteful number, since it uses less digits than its factorization.

1230310220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008521 (or 1008519 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1230310220 is about 35075.7782522355. The cubic root of 1230310220 is about 1071.5313386802.

Adding to 1230310220 its reverse (220130321), we get a palindrome (1450440541).

The spelling of 1230310220 in words is "one billion, two hundred thirty million, three hundred ten thousand, two hundred twenty".

Divisors: 1 2 4 5 10 20 61 122 244 305 610 1220 1008451 2016902 4033804 5042255 10084510 20169020 61515511 123031022 246062044 307577555 615155110 1230310220