| Base | Representation |
|---|---|
| bin | 11010011000101100… |
| … | …010101010100000000 |
| 3 | 2201010110211111001000 |
| 4 | 122120230111110000 |
| 5 | 431010334442430 |
| 6 | 21003151412000 |
| 7 | 2022040206552 |
| oct | 323054252400 |
| 9 | 81113744030 |
| 10 | 28331562240 |
| 11 | 11019479053 |
| 12 | 55a8224000 |
| 13 | 2896819917 |
| 14 | 152aa1b4d2 |
| 15 | b0c40be60 |
| hex | 698b15500 |
28331562240 has 576 divisors, whose sum is σ = 104018342400. Its totient is φ = 7299072000.
The previous prime is 28331562239. The next prime is 28331562247. The reversal of 28331562240 is 4226513382.
28331562240 is a `hidden beast` number, since 28 + 3 + 3 + 1 + 5 + 622 + 4 + 0 = 666.
It is a tau number, because it is divible by the number of its divisors (576).
It is a Harshad number since it is a multiple of its sum of digits (36).
It is a junction number, because it is equal to n+sod(n) for n = 28331562195 and 28331562204.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (28331562247) 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 63 ways as a sum of consecutive naturals, for example, 187626165 + ... + 187626315.
It is an arithmetic number, because the mean of its divisors is an integer number (180587400).
Almost surely, 228331562240 is an apocalyptic number.
28331562240 is a gapful number since it is divisible by the number (20) 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 28331562240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52009171200).
28331562240 is an abundant number, since it is smaller than the sum of its proper divisors (75686780160).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
28331562240 is a wasteful number, since it uses less digits than its factorization.
28331562240 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 331 (or 311 counting only the distinct ones).
The product of its (nonzero) digits is 69120, while the sum is 36.
The spelling of 28331562240 in words is "twenty-eight billion, three hundred thirty-one million, five hundred sixty-two thousand, two hundred forty".
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