Base | Representation |
---|---|
bin | 1110001110010100011000… |
… | …10000010110011100000000 |
3 | 11002202011202211222021101210 |
4 | 13013022030100112130000 |
5 | 13044430432031232140 |
6 | 150305015510330120 |
7 | 6405532361221224 |
oct | 707121420263400 |
9 | 132664684867353 |
10 | 31278304945920 |
11 | 9a6a066799a8a |
12 | 3611b41059940 |
13 | 145b6ba924786 |
14 | 7a1c41494784 |
15 | 393949259d80 |
hex | 1c728c416700 |
31278304945920 has 144 divisors (see below), whose sum is σ = 100331312326560. Its totient is φ = 8304458022912.
The previous prime is 31278304945891. The next prime is 31278304945933. The reversal of 31278304945920 is 2954940387213.
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16905339 + ... + 18664058.
It is an arithmetic number, because the mean of its divisors is an integer number (696745224490).
Almost surely, 231278304945920 is an apocalyptic number.
31278304945920 is a gapful number since it is divisible by the number (30) formed by its first and last digit.
It is an amenable number.
31278304945920 is an abundant number, since it is smaller than the sum of its proper divisors (69053007380640).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
31278304945920 is a wasteful number, since it uses less digits than its factorization.
31278304945920 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 35569650 (or 35569636 counting only the distinct ones).
The product of its (nonzero) digits is 13063680, while the sum is 57.
The spelling of 31278304945920 in words is "thirty-one trillion, two hundred seventy-eight billion, three hundred four million, nine hundred forty-five thousand, nine hundred twenty".
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