| Base | Representation |
|---|---|
| bin | 101000100101011… |
| … | …1010011000000000 |
| 3 | 10111220111101001002 |
| 4 | 1101022322120000 |
| 5 | 10242111040130 |
| 6 | 343044231132 |
| 7 | 45514144145 |
| oct | 12112723000 |
| 9 | 3456441032 |
| 10 | 1361815040 |
| 11 | 639788883 |
| 12 | 32009b4a8 |
| 13 | 18919c121 |
| 14 | ccc123cc |
| 15 | 7e850b45 |
| hex | 512ba600 |
1361815040 has 80 divisors (see below), whose sum is σ = 3284321040. Its totient is φ = 541532160.
The previous prime is 1361815009. The next prime is 1361815043. The reversal of 1361815040 is 405181631.
It is a tau number, because it is divible by the number of its divisors (80).
It is a junction number, because it is equal to n+sod(n) for n = 1361814994 and 1361815012.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1361815043) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 461891 + ... + 464829.
It is an arithmetic number, because the mean of its divisors is an integer number (41054013).
Almost surely, 21361815040 is an apocalyptic number.
1361815040 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 1361815040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1642160520).
1361815040 is an abundant number, since it is smaller than the sum of its proper divisors (1922506000).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1361815040 is an equidigital number, since it uses as much as digits as its factorization.
1361815040 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 3143 (or 3127 counting only the distinct ones).
The product of its (nonzero) digits is 2880, while the sum is 29.
The square root of 1361815040 is about 36902.7782151968. The cubic root of 1361815040 is about 1108.4243097663.
Adding to 1361815040 its reverse (405181631), we get a palindrome (1766996671).
The spelling of 1361815040 in words is "one billion, three hundred sixty-one million, eight hundred fifteen thousand, forty".
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