| Base | Representation |
|---|---|
| bin | 100101001010100… |
| … | …1111011100000000 |
| 3 | 10012220121100020010 |
| 4 | 1022111033130000 |
| 5 | 10023223112430 |
| 6 | 323425144520 |
| 7 | 42622011165 |
| oct | 11225173400 |
| 9 | 3186540203 |
| 10 | 1247082240 |
| 11 | 58aa44388 |
| 12 | 2a978b140 |
| 13 | 16b49a7b1 |
| 14 | bb8a806c |
| 15 | 7473acb0 |
| hex | 4a54f700 |
1247082240 has 216 divisors, whose sum is σ = 4126369968. Its totient is φ = 320798720.
The previous prime is 1247082227. The next prime is 1247082247. The reversal of 1247082240 is 422807421.
It is a super-2 number, since 2×12470822402 = 3110428226646835200, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (30).
It is a junction number, because it is equal to n+sod(n) for n = 1247082198 and 1247082207.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1247082247) by changing a digit.
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 23 ways as a sum of consecutive naturals, for example, 14012116 + ... + 14012204.
Almost surely, 21247082240 is an apocalyptic number.
1247082240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 1247082240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2063184984).
1247082240 is an abundant number, since it is smaller than the sum of its proper divisors (2879287728).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1247082240 is an frugal number, since it uses more digits than its factorization.
1247082240 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 243 (or 140 counting only the distinct ones).
The product of its (nonzero) digits is 7168, while the sum is 30.
The square root of 1247082240 is about 35314.0515942309. The cubic root of 1247082240 is about 1076.3785422488.
Adding to 1247082240 its reverse (422807421), we get a palindrome (1669889661).
The spelling of 1247082240 in words is "one billion, two hundred forty-seven million, eighty-two thousand, two hundred forty".
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