Base | Representation |
---|---|
bin | 111001100000… |
… | …0101010100000 |
3 | 2002201202001000 |
4 | 1303000222200 |
5 | 30204234110 |
6 | 2554112000 |
7 | 514156530 |
oct | 163005240 |
9 | 62652030 |
10 | 30149280 |
11 | 16022667 |
12 | a11b600 |
13 | 6327c15 |
14 | 400b4c0 |
15 | 29a81c0 |
hex | 1cc0aa0 |
30149280 has 192 divisors, whose sum is σ = 120718080. Its totient is φ = 6884352.
The previous prime is 30149261. The next prime is 30149281. The reversal of 30149280 is 8294103.
It is a Harshad number since it is a multiple of its sum of digits (27).
It is not an unprimeable number, because it can be changed into a prime (30149281) by changing a digit.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29742 + ... + 30738.
It is an arithmetic number, because the mean of its divisors is an integer number (628740).
Almost surely, 230149280 is an apocalyptic number.
30149280 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 30149280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60359040).
30149280 is an abundant number, since it is smaller than the sum of its proper divisors (90568800).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
30149280 is a wasteful number, since it uses less digits than its factorization.
30149280 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1028 (or 1014 counting only the distinct ones).
The product of its (nonzero) digits is 1728, while the sum is 27.
The square root of 30149280 is about 5490.8360019217. The cubic root of 30149280 is about 311.2377843950.
The spelling of 30149280 in words is "thirty million, one hundred forty-nine thousand, two hundred eighty".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.070 sec. • engine limits •