Base | Representation |
---|---|
bin | 10110101000100… |
… | …010010111100001 |
3 | 222110112001011022 |
4 | 112220202113201 |
5 | 1234202202111 |
6 | 101402455225 |
7 | 12260416535 |
oct | 2650422741 |
9 | 873461138 |
10 | 379725281 |
11 | 185388251 |
12 | a7204515 |
13 | 60893120 |
14 | 38607bc5 |
15 | 2350b2db |
hex | 16a225e1 |
379725281 has 12 divisors (see below), whose sum is σ = 411465852. Its totient is φ = 348358464.
The previous prime is 379725211. The next prime is 379725319. The reversal of 379725281 is 182527973.
It can be written as a sum of positive squares in 6 ways, for example, as 2588881 + 377136400 = 1609^2 + 19420^2 .
It is not a de Polignac number, because 379725281 - 214 = 379708897 is a prime.
It is a super-2 number, since 2×3797252812 = 288382578061057922, which contains 22 as substring.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (379725211) 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 11 ways as a sum of consecutive naturals, for example, 681455 + ... + 682011.
It is an arithmetic number, because the mean of its divisors is an integer number (34288821).
Almost surely, 2379725281 is an apocalyptic number.
It is an amenable number.
379725281 is a deficient number, since it is larger than the sum of its proper divisors (31740571).
379725281 is an equidigital number, since it uses as much as digits as its factorization.
379725281 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1028 (or 799 counting only the distinct ones).
The product of its digits is 211680, while the sum is 44.
The square root of 379725281 is about 19486.5410219464. The cubic root of 379725281 is about 724.1410555371.
The spelling of 379725281 in words is "three hundred seventy-nine million, seven hundred twenty-five thousand, two hundred eighty-one".
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