Base | Representation |
---|---|
bin | 11100011101111… |
… | …10101111011111 |
3 | 121122100201000220 |
4 | 32032332233133 |
5 | 442113324111 |
6 | 35410252423 |
7 | 5626556220 |
oct | 1616765737 |
9 | 548321026 |
10 | 238808031 |
11 | 11288a010 |
12 | 67b87113 |
13 | 3a624437 |
14 | 23a05247 |
15 | 15e72e06 |
hex | e3bebdf |
238808031 has 16 divisors (see below), whose sum is σ = 396979968. Its totient is φ = 124056000.
The previous prime is 238808029. The next prime is 238808051. The reversal of 238808031 is 130808832.
It is not a de Polignac number, because 238808031 - 21 = 238808029 is a prime.
It is a super-2 number, since 2×2388080312 = 114058551340193922, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (33).
It is a junction number, because it is equal to n+sod(n) for n = 238807983 and 238808001.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (238808051) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 516670 + ... + 517131.
It is an arithmetic number, because the mean of its divisors is an integer number (24811248).
Almost surely, 2238808031 is an apocalyptic number.
238808031 is a gapful number since it is divisible by the number (21) formed by its first and last digit.
238808031 is a deficient number, since it is larger than the sum of its proper divisors (158171937).
238808031 is a wasteful number, since it uses less digits than its factorization.
238808031 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1033822.
The product of its (nonzero) digits is 9216, while the sum is 33.
The square root of 238808031 is about 15453.4148653299. The cubic root of 238808031 is about 620.4159808130.
The spelling of 238808031 in words is "two hundred thirty-eight million, eight hundred eight thousand, thirty-one".
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