Base | Representation |
---|---|
bin | 10111101111110… |
… | …010000000110101 |
3 | 1000202122220020102 |
4 | 113233302000311 |
5 | 1303442322324 |
6 | 103311043445 |
7 | 12605233445 |
oct | 2757620065 |
9 | 1022586212 |
10 | 398401589 |
11 | 194984013 |
12 | b1510585 |
13 | 64701bb1 |
14 | 3acaa125 |
15 | 24e99dae |
hex | 17bf2035 |
398401589 has 2 divisors, whose sum is σ = 398401590. Its totient is φ = 398401588.
The previous prime is 398401559. The next prime is 398401651. The reversal of 398401589 is 985104893.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 370755025 + 27646564 = 19255^2 + 5258^2 .
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-398401589 is a prime.
It is a super-2 number, since 2×3984015892 = 317447652235449842, which contains 22 as substring.
It is a Sophie Germain prime.
It is a Curzon number.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (398401529) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199200794 + 199200795.
It is an arithmetic number, because the mean of its divisors is an integer number (199200795).
Almost surely, 2398401589 is an apocalyptic number.
It is an amenable number.
398401589 is a deficient number, since it is larger than the sum of its proper divisors (1).
398401589 is an equidigital number, since it uses as much as digits as its factorization.
398401589 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 311040, while the sum is 47.
The square root of 398401589 is about 19959.9997244489. Note that the first 3 decimals coincide. The cubic root of 398401589 is about 735.8235567954.
The spelling of 398401589 in words is "three hundred ninety-eight million, four hundred one thousand, five hundred eighty-nine".
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