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1230304160 = 2557689401
BaseRepresentation
bin100100101010100…
…1111001110100000
310011202000221000202
41021111033032200
510004424213120
6322025404332
742326261411
oct11125171640
93152027022
101230304160
115815247a8
122a40396a8
13167b74a37
14b957b808
1573024875
hex4954f3a0

1230304160 has 24 divisors (see below), whose sum is σ = 2906593956. Its totient is φ = 492121600.

The previous prime is 1230304147. The next prime is 1230304177. The reversal of 1230304160 is 614030321.

It can be written as a sum of positive squares in 2 ways, for example, as 1142169616 + 88134544 = 33796^2 + 9388^2 .

It is a super-2 number, since 2×12303041602 = 3027296652226611200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 3844541 + ... + 3844860.

Almost surely, 21230304160 is an apocalyptic number.

1230304160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1230304160 is an abundant number, since it is smaller than the sum of its proper divisors (1676289796).

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

1230304160 is an equidigital number, since it uses as much as digits as its factorization.

1230304160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7689416 (or 7689408 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1230304160 is about 35075.6918677308. The cubic root of 1230304160 is about 1071.5295793704.

Adding to 1230304160 its reverse (614030321), we get a palindrome (1844334481).

The spelling of 1230304160 in words is "one billion, two hundred thirty million, three hundred four thousand, one hundred sixty".

Divisors: 1 2 4 5 8 10 16 20 32 40 80 160 7689401 15378802 30757604 38447005 61515208 76894010 123030416 153788020 246060832 307576040 615152080 1230304160