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230561560 = 2356139403
BaseRepresentation
bin11011011111000…
…01011100011000
3121001211202000001
431233201130120
5433010432220
634513422344
75466512065
oct1557413430
9531752001
10230561560
11109167349
126526a9b4
13389c7a78
1422899c6c
151539480a
hexdbe1718

230561560 has 32 divisors (see below), whose sum is σ = 519665040. Its totient is φ = 92064384.

The previous prime is 230561543. The next prime is 230561563. The reversal of 230561560 is 65165032.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230561563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19819 + ... + 29221.

Almost surely, 2230561560 is an apocalyptic number.

230561560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

230561560 is an abundant number, since it is smaller than the sum of its proper divisors (289103480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

230561560 is a wasteful number, since it uses less digits than its factorization.

230561560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10027 (or 10023 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 230561560 is about 15184.2536859735. The cubic root of 230561560 is about 613.1908052033.

The spelling of 230561560 in words is "two hundred thirty million, five hundred sixty-one thousand, five hundred sixty".

Divisors: 1 2 4 5 8 10 20 40 613 1226 2452 3065 4904 6130 9403 12260 18806 24520 37612 47015 75224 94030 188060 376120 5764039 11528078 23056156 28820195 46112312 57640390 115280780 230561560