| Base | Representation |
|---|---|
| bin | 110101110111… |
| … | …1011000100000 |
| 3 | 1222010220210010 |
| 4 | 1223233120200 |
| 5 | 24212242423 |
| 6 | 2445204520 |
| 7 | 462031350 |
| oct | 153573040 |
| 9 | 58126703 |
| 10 | 28243488 |
| 11 | 14a40829 |
| 12 | 9560740 |
| 13 | 5b0b630 |
| 14 | 3a72b60 |
| 15 | 272d693 |
| hex | 1aef620 |
28243488 has 192 divisors, whose sum is σ = 94493952. Its totient is φ = 7188480.
The previous prime is 28243487. The next prime is 28243507. The reversal of 28243488 is 88434282.
It is a super-2 number, since 2×282434882 = 1595389228812288, which contains 22 as substring.
It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.
It is a Harshad number since it is a multiple of its sum of digits (39).
It is a nude number because it is divisible by every one of its digits.
It is not an unprimeable number, because it can be changed into a prime (28243483) 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 31 ways as a sum of consecutive naturals, for example, 462978 + ... + 463038.
It is an arithmetic number, because the mean of its divisors is an integer number (492156).
Almost surely, 228243488 is an apocalyptic number.
28243488 is a gapful number since it is divisible by the number (28) 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 28243488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47246976).
28243488 is an abundant number, since it is smaller than the sum of its proper divisors (66250464).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
28243488 is a wasteful number, since it uses less digits than its factorization.
28243488 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 147 (or 139 counting only the distinct ones).
The product of its digits is 98304, while the sum is 39.
The square root of 28243488 is about 5314.4602736308. The cubic root of 28243488 is about 304.5365639425.
The spelling of 28243488 in words is "twenty-eight million, two hundred forty-three thousand, four hundred eighty-eight".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.067 sec. • engine limits •