| Base | Representation |
|---|---|
| bin | 100010011010111… |
| … | …1110011011000000 |
| 3 | 2222111100002010210 |
| 4 | 1010311332123000 |
| 5 | 4331140000000 |
| 6 | 310335354120 |
| 7 | 40423223640 |
| oct | 10465763300 |
| 9 | 2874302123 |
| 10 | 1155000000 |
| 11 | 542a70660 |
| 12 | 282982940 |
| 13 | 155399b6b |
| 14 | ad578520 |
| 15 | 6b5ec350 |
| hex | 44d7e6c0 |
1155000000 has 448 divisors, whose sum is σ = 4762487808. Its totient is φ = 240000000.
The previous prime is 1154999983. The next prime is 1155000001. The reversal of 1155000000 is 5511.
It is a tau number, because it is divible by the number of its divisors (448).
It is a Harshad number since it is a multiple of its sum of digits (12).
It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.
It is a zygodrome in base 10.
It is a self number, because there is not a number n which added to its sum of digits gives 1155000000.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1155000001) by changing a digit.
It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 104999995 + ... + 105000005.
Almost surely, 21155000000 is an apocalyptic number.
1155000000 is a gapful number since it is divisible by the number (10) 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 1155000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2381243904).
1155000000 is an abundant number, since it is smaller than the sum of its proper divisors (3607487808).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1155000000 is an frugal number, since it uses more digits than its factorization.
1155000000 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 68 (or 28 counting only the distinct ones).
The product of its (nonzero) digits is 25, while the sum is 12.
The square root of 1155000000 is about 33985.2909359329. The cubic root of 1155000000 is about 1049.2057485623.
Adding to 1155000000 its reverse (5511), we get a palindrome (1155005511).
The spelling of 1155000000 in words is "one billion, one hundred fifty-five million", and thus it is an aban number.
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