| Base | Representation |
|---|---|
| bin | 100101000011011… |
| … | …1011110110110100 |
| 3 | 10012122112210220002 |
| 4 | 1022012323312310 |
| 5 | 10021243111040 |
| 6 | 323212530432 |
| 7 | 42545101460 |
| oct | 11206736664 |
| 9 | 3178483802 |
| 10 | 1243332020 |
| 11 | 588912827 |
| 12 | 2a8480a18 |
| 13 | 16a786828 |
| 14 | bb1ad4a0 |
| 15 | 74249a15 |
| hex | 4a1bbdb4 |
1243332020 has 72 divisors (see below), whose sum is σ = 3024370944. Its totient is φ = 420593472.
The previous prime is 1243332017. The next prime is 1243332029. The reversal of 1243332020 is 202333421.
It is a Harshad number since it is a multiple of its sum of digits (20).
It is a junction number, because it is equal to n+sod(n) for n = 1243331983 and 1243332001.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1243332029) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 873029 + ... + 874451.
It is an arithmetic number, because the mean of its divisors is an integer number (42005152).
Almost surely, 21243332020 is an apocalyptic number.
1243332020 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 1243332020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1512185472).
1243332020 is an abundant number, since it is smaller than the sum of its proper divisors (1781038924).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1243332020 is a wasteful number, since it uses less digits than its factorization.
1243332020 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1597 (or 1516 counting only the distinct ones).
The product of its (nonzero) digits is 864, while the sum is 20.
The square root of 1243332020 is about 35260.9134878834. The cubic root of 1243332020 is about 1075.2984986829.
Adding to 1243332020 its reverse (202333421), we get a palindrome (1445665441).
The spelling of 1243332020 in words is "one billion, two hundred forty-three million, three hundred thirty-two thousand, twenty".
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