Base | Representation |
---|---|
bin | 110110110111… |
… | …0000010000000 |
3 | 2000010021101011 |
4 | 1231232002000 |
5 | 24330342430 |
6 | 2504250304 |
7 | 466321633 |
oct | 155560200 |
9 | 60107334 |
10 | 28762240 |
11 | 15265551 |
12 | 9770994 |
13 | 5c607a0 |
14 | 3b69c1a |
15 | 27d222a |
hex | 1b6e080 |
28762240 has 64 divisors (see below), whose sum is σ = 74070360. Its totient is φ = 10616832.
The previous prime is 28762231. The next prime is 28762277. The reversal of 28762240 is 4226782.
It can be written as a sum of positive squares in 4 ways, for example, as 8620096 + 20142144 = 2936^2 + 4488^2 .
It is a tau number, because it is divible by the number of its divisors (64).
It is an unprimeable number.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6592 + ... + 10048.
Almost surely, 228762240 is an apocalyptic number.
28762240 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 28762240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37035180).
28762240 is an abundant number, since it is smaller than the sum of its proper divisors (45308120).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
28762240 is a wasteful number, since it uses less digits than its factorization.
28762240 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 3489 (or 3477 counting only the distinct ones).
The product of its (nonzero) digits is 10752, while the sum is 31.
The square root of 28762240 is about 5363.0439118098. The cubic root of 28762240 is about 306.3897521268.
The spelling of 28762240 in words is "twenty-eight million, seven hundred sixty-two thousand, two hundred forty".
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