Base | Representation |
---|---|
bin | 11100110011100011… |
… | …110000010011001000 |
3 | 2221211112211201110000 |
4 | 130303203300103020 |
5 | 1001321011010320 |
6 | 22113044323000 |
7 | 2143316544300 |
oct | 346343602310 |
9 | 87745751400 |
10 | 30929781960 |
11 | 12132067a80 |
12 | 5bb23a3460 |
13 | 2bbbbb843c |
14 | 16d5b18600 |
15 | c10589c90 |
hex | 7338f04c8 |
30929781960 has 960 divisors, whose sum is σ = 134077680000. Its totient is φ = 6322821120.
The previous prime is 30929781937. The next prime is 30929781977. The reversal of 30929781960 is 6918792903.
It is a Harshad number since it is a multiple of its sum of digits (54).
It is a junction number, because it is equal to n+sod(n) for n = 30929781897 and 30929781906.
It is an unprimeable number.
It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 155425941 + ... + 155426139.
It is an arithmetic number, because the mean of its divisors is an integer number (139664250).
Almost surely, 230929781960 is an apocalyptic number.
30929781960 is a gapful number since it is divisible by the number (30) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 30929781960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67038840000).
30929781960 is an abundant number, since it is smaller than the sum of its proper divisors (103147898040).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
30929781960 is a wasteful number, since it uses less digits than its factorization.
30929781960 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 336 (or 316 counting only the distinct ones).
The product of its (nonzero) digits is 1469664, while the sum is 54.
The spelling of 30929781960 in words is "thirty billion, nine hundred twenty-nine million, seven hundred eighty-one thousand, nine hundred sixty".
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