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230638180 = 22511531909
BaseRepresentation
bin11011011111101…
…00001001100100
3121001222122002211
431233310021210
5433020410210
634515213204
75500251343
oct1557641144
9531878084
10230638180
11109209973
12652a7204
1338a238c6
14228b9b5a
15153ac38a
hexdbf4264

230638180 has 12 divisors (see below), whose sum is σ = 484340220. Its totient is φ = 92255264.

The previous prime is 230638153. The next prime is 230638183. The reversal of 230638180 is 81836032.

It can be written as a sum of positive squares in 2 ways, for example, as 107827456 + 122810724 = 10384^2 + 11082^2 .

It is not an unprimeable number, because it can be changed into a prime (230638183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5765935 + ... + 5765974.

It is an arithmetic number, because the mean of its divisors is an integer number (40361685).

Almost surely, 2230638180 is an apocalyptic number.

230638180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

230638180 is an abundant number, since it is smaller than the sum of its proper divisors (253702040).

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

230638180 is a wasteful number, since it uses less digits than its factorization.

230638180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11531918 (or 11531916 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 230638180 is about 15186.7764848239. The cubic root of 230638180 is about 613.2587226769.

The spelling of 230638180 in words is "two hundred thirty million, six hundred thirty-eight thousand, one hundred eighty".

Divisors: 1 2 4 5 10 20 11531909 23063818 46127636 57659545 115319090 230638180