Base | Representation |
---|---|
bin | 110111000100… |
… | …1010100100000 |
3 | 2000022221201000 |
4 | 1232021110200 |
5 | 24342432031 |
6 | 2510512000 |
7 | 500265543 |
oct | 156112440 |
9 | 60287630 |
10 | 28874016 |
11 | 15331526 |
12 | 9805600 |
13 | 5c9c622 |
14 | 3b9885a |
15 | 28053e6 |
hex | 1b89520 |
28874016 has 96 divisors (see below), whose sum is σ = 87937920. Its totient is φ = 9199872.
The previous prime is 28874009. The next prime is 28874017. The reversal of 28874016 is 61047882.
It is a tau number, because it is divible by the number of its divisors (96).
It is a Harshad number since it is a multiple of its sum of digits (36).
It is not an unprimeable number, because it can be changed into a prime (28874017) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19146 + ... + 20598.
It is an arithmetic number, because the mean of its divisors is an integer number (916020).
Almost surely, 228874016 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 28874016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43968960).
28874016 is an abundant number, since it is smaller than the sum of its proper divisors (59063904).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
28874016 is a wasteful number, since it uses less digits than its factorization.
28874016 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1495 (or 1481 counting only the distinct ones).
The product of its (nonzero) digits is 21504, while the sum is 36.
The square root of 28874016 is about 5373.4547546248. The cubic root of 28874016 is about 306.7861370259.
It can be divided in two parts, 2887 and 4016, that added together give a triangular number (6903 = T117).
The spelling of 28874016 in words is "twenty-eight million, eight hundred seventy-four thousand, sixteen".
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