Base | Representation |
---|---|
bin | 111011101101… |
… | …0100010010100 |
3 | 2011220101210001 |
4 | 1313122202110 |
5 | 31003210303 |
6 | 3034541044 |
7 | 530035543 |
oct | 167324224 |
9 | 64811701 |
10 | 31303828 |
11 | 16741036 |
12 | a597784 |
13 | 664059a |
14 | 422c15a |
15 | 2b3531d |
hex | 1dda894 |
31303828 has 48 divisors (see below), whose sum is σ = 60230016. Its totient is φ = 14192640.
The previous prime is 31303823. The next prime is 31303837. The reversal of 31303828 is 82830313.
31303828 is a nontrivial binomial coefficient, being equal to C(7913, 2).
It is a junction number, because it is equal to n+sod(n) for n = 31303796 and 31303805.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (31303823) 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 15 ways as a sum of consecutive naturals, for example, 162100 + ... + 162292.
It is an arithmetic number, because the mean of its divisors is an integer number (1254792).
Almost surely, 231303828 is an apocalyptic number.
31303828 is the 7912-nd triangular number.
31303828 is the 2638-th centered nonagonal number.
It is an amenable number.
31303828 is a deficient number, since it is larger than the sum of its proper divisors (28926188).
31303828 is a wasteful number, since it uses less digits than its factorization.
31303828 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 304 (or 302 counting only the distinct ones).
The product of its (nonzero) digits is 3456, while the sum is 28.
The square root of 31303828 is about 5594.9823949678. The cubic root of 31303828 is about 315.1610094821.
It can be divided in two parts, 31303 and 828, that added together give a triangular number (32131 = T253).
The spelling of 31303828 in words is "thirty-one million, three hundred three thousand, eight hundred twenty-eight".
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