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230280393 = 37233071553
BaseRepresentation
bin11011011100111…
…00110011001001
3121001022110022110
431232130303021
5432422433033
634503412533
75464231260
oct1556346311
9531273273
10230280393
11108a95082
1265154149
1338929ab5
14228255d7
151533b363
hexdb9ccc9

230280393 has 32 divisors (see below), whose sum is σ = 367589376. Its totient is φ = 125376768.

The previous prime is 230280373. The next prime is 230280397. The reversal of 230280393 is 393082032.

It is not a de Polignac number, because 230280393 - 28 = 230280137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 230280393.

It is not an unprimeable number, because it can be changed into a prime (230280397) 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, 147505 + ... + 149057.

It is an arithmetic number, because the mean of its divisors is an integer number (11487168).

Almost surely, 2230280393 is an apocalyptic number.

230280393 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

230280393 is a deficient number, since it is larger than the sum of its proper divisors (137308983).

230280393 is a wasteful number, since it uses less digits than its factorization.

230280393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1893.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 230280393 is about 15174.9923558465. The cubic root of 230280393 is about 612.9414442514.

The spelling of 230280393 in words is "two hundred thirty million, two hundred eighty thousand, three hundred ninety-three".

Divisors: 1 3 7 21 23 69 161 307 483 921 1553 2149 4659 6447 7061 10871 21183 32613 35719 49427 107157 148281 250033 476771 750099 1430313 3337397 10012191 10965733 32897199 76760131 230280393