Base | Representation |
---|---|
bin | 111100100110… |
… | …0110101011000 |
3 | 2012210011222110 |
4 | 1321030311120 |
5 | 31113200432 |
6 | 3052552320 |
7 | 534025500 |
oct | 171146530 |
9 | 65704873 |
10 | 31771992 |
11 | 16a3084a |
12 | a7826a0 |
13 | 67756c5 |
14 | 4310a00 |
15 | 2bc8dcc |
hex | 1e4cd58 |
31771992 has 48 divisors (see below), whose sum is σ = 92401560. Its totient is φ = 9077376.
The previous prime is 31771973. The next prime is 31772017. The reversal of 31771992 is 29917713.
It is a self number, because there is not a number n which added to its sum of digits gives 31771992.
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 11 ways as a sum of consecutive naturals, for example, 12333 + ... + 14684.
Almost surely, 231771992 is an apocalyptic number.
It is an amenable number.
31771992 is an abundant number, since it is smaller than the sum of its proper divisors (60629568).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
31771992 is a wasteful number, since it uses less digits than its factorization.
31771992 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 27040 (or 27029 counting only the distinct ones).
The product of its digits is 23814, while the sum is 39.
The square root of 31771992 is about 5636.6649714171. The cubic root of 31771992 is about 316.7243704017.
The spelling of 31771992 in words is "thirty-one million, seven hundred seventy-one thousand, nine hundred ninety-two".
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