Base | Representation |
---|---|
bin | 1010011011111111… |
… | …1000101101111000 |
3 | 21020021000102100222 |
4 | 2212333320231320 |
5 | 21214222441430 |
6 | 1142003315212 |
7 | 126300416531 |
oct | 24677705570 |
9 | 7207012328 |
10 | 2801765240 |
11 | 120858376a |
12 | 66237bb08 |
13 | 3585c7871 |
14 | 1c8163688 |
15 | 115e879e5 |
hex | a6ff8b78 |
2801765240 has 128 divisors (see below), whose sum is σ = 6998400000. Its totient is φ = 1004095488.
The previous prime is 2801765227. The next prime is 2801765249. The reversal of 2801765240 is 425671082.
It is a self number, because there is not a number n which added to its sum of digits gives 2801765240.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (2801765249) by changing a digit.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5614511 + ... + 5615009.
It is an arithmetic number, because the mean of its divisors is an integer number (54675000).
Almost surely, 22801765240 is an apocalyptic number.
2801765240 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 2801765240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3499200000).
2801765240 is an abundant number, since it is smaller than the sum of its proper divisors (4196634760).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
2801765240 is a wasteful number, since it uses less digits than its factorization.
2801765240 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 909 (or 905 counting only the distinct ones).
The product of its (nonzero) digits is 26880, while the sum is 35.
The square root of 2801765240 is about 52931.7035433397. The cubic root of 2801765240 is about 1409.7558788000.
The spelling of 2801765240 in words is "two billion, eight hundred one million, seven hundred sixty-five thousand, two hundred forty".
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