Base | Representation |
---|---|
bin | 1001001010110… |
… | …11101110000000 |
3 | 12100202000202220 |
4 | 10211123232000 |
5 | 124142443403 |
6 | 11344411040 |
7 | 1622552412 |
oct | 445335600 |
9 | 170660686 |
10 | 76921728 |
11 | 3a469484 |
12 | 21916a80 |
13 | 12c23220 |
14 | a3049b2 |
15 | 6b46953 |
hex | 495bb80 |
76921728 has 128 divisors (see below), whose sum is σ = 231907200. Its totient is φ = 22394880.
The previous prime is 76921723. The next prime is 76921769. The reversal of 76921728 is 82712967.
It is a tau number, because it is divible by the number of its divisors (128).
It is a self number, because there is not a number n which added to its sum of digits gives 76921728.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (76921723) 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, 94443 + ... + 95253.
It is an arithmetic number, because the mean of its divisors is an integer number (1811775).
Almost surely, 276921728 is an apocalyptic number.
76921728 is a gapful number since it is divisible by the number (78) 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 76921728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115953600).
76921728 is an abundant number, since it is smaller than the sum of its proper divisors (154985472).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
76921728 is a wasteful number, since it uses less digits than its factorization.
76921728 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 860 (or 848 counting only the distinct ones).
The product of its digits is 84672, while the sum is 42.
The square root of 76921728 is about 8770.5032922860. The cubic root of 76921728 is about 425.2878843045.
The spelling of 76921728 in words is "seventy-six million, nine hundred twenty-one thousand, seven hundred twenty-eight".
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