| Base | Representation |
|---|---|
| bin | 11011100111010… |
| … | …00111010000000 |
| 3 | 121010212120022100 |
| 4 | 31303220322000 |
| 5 | 433300000304 |
| 6 | 34552510400 |
| 7 | 5511625221 |
| oct | 1563507200 |
| 9 | 533776270 |
| 10 | 231640704 |
| 11 | 1098340a9 |
| 12 | 656ab400 |
| 13 | 38cb5009 |
| 14 | 22a9b248 |
| 15 | 15509439 |
| hex | dce8e80 |
231640704 has 144 divisors (see below), whose sum is σ = 704762370. Its totient is φ = 73018368.
The previous prime is 231640681. The next prime is 231640709. The reversal of 231640704 is 407046132.
231640704 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.
It can be written as a sum of positive squares in only one way, i.e., 226442304 + 5198400 = 15048^2 + 2280^2 .
It is a tau number, because it is divible by the number of its divisors (144).
It is not an unprimeable number, because it can be changed into a prime (231640709) 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 17 ways as a sum of consecutive naturals, for example, 415594 + ... + 416150.
Almost surely, 2231640704 is an apocalyptic number.
231640704 is a gapful number since it is divisible by the number (24) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 231640704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (352381185).
231640704 is an abundant number, since it is smaller than the sum of its proper divisors (473121666).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
231640704 is a wasteful number, since it uses less digits than its factorization.
231640704 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 615 (or 581 counting only the distinct ones).
The product of its (nonzero) digits is 4032, while the sum is 27.
The square root of 231640704 is about 15219.7471726701. The cubic root of 231640704 is about 614.1459968934.
Adding to 231640704 its reverse (407046132), we get a palindrome (638686836).
The spelling of 231640704 in words is "two hundred thirty-one million, six hundred forty thousand, seven hundred four".
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