| Base | Representation |
|---|---|
| bin | 100101100111100… |
| … | …100001100010100 |
| 3 | 1121222120200000200 |
| 4 | 211213210030110 |
| 5 | 2243032110402 |
| 6 | 142343140500 |
| 7 | 21432335544 |
| oct | 4547441424 |
| 9 | 1558520020 |
| 10 | 631128852 |
| 11 | 2a428a4a2 |
| 12 | 157444730 |
| 13 | a09a7633 |
| 14 | 5db6b324 |
| 15 | 3a61b21c |
| hex | 259e4314 |
631128852 has 72 divisors (see below), whose sum is σ = 1687664160. Its totient is φ = 198313920.
The previous prime is 631128847. The next prime is 631128881. The reversal of 631128852 is 258821136.
It is a happy number.
631128852 is a `hidden beast` number, since 631 + 12 + 8 + 8 + 5 + 2 = 666.
It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.
It is a Harshad number since it is a multiple of its sum of digits (36).
Its product of digits (23040) is a multiple of the sum of its prime divisors (4608).
It is a congruent number.
It is an unprimeable number.
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 23 ways as a sum of consecutive naturals, for example, 142138 + ... + 146510.
It is an arithmetic number, because the mean of its divisors is an integer number (23439780).
Almost surely, 2631128852 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 631128852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (843832080).
631128852 is an abundant number, since it is smaller than the sum of its proper divisors (1056535308).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
631128852 is a wasteful number, since it uses less digits than its factorization.
631128852 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 4613 (or 4608 counting only the distinct ones).
The product of its digits is 23040, while the sum is 36.
The square root of 631128852 is about 25122.2780018055. The cubic root of 631128852 is about 857.7736048316.
Adding to 631128852 its reverse (258821136), we get a palindrome (889949988).
The spelling of 631128852 in words is "six hundred thirty-one million, one hundred twenty-eight thousand, eight hundred fifty-two".
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