| Base | Representation |
|---|---|
| bin | 1111010111110… |
| … | …11001101101000 |
| 3 | 22222122121100000 |
| 4 | 13223323031220 |
| 5 | 231003031430 |
| 6 | 20443543000 |
| 7 | 3124046541 |
| oct | 753731550 |
| 9 | 288577300 |
| 10 | 128955240 |
| 11 | 66878a87 |
| 12 | 3722aa60 |
| 13 | 2094109b |
| 14 | 131ab4c8 |
| 15 | b4c3e60 |
| hex | 7afb368 |
128955240 has 96 divisors (see below), whose sum is σ = 434659680. Its totient is φ = 34385472.
The previous prime is 128955187. The next prime is 128955293. The reversal of 128955240 is 42559821.
128955240 is a `hidden beast` number, since 128 + 9 + 5 + 524 + 0 = 666.
It is an interprime number because it is at equal distance from previous prime (128955187) and next prime (128955293).
It is a super-3 number, since 3×1289552403 (a number of 25 digits) contains 333 as substring.
It is a Harshad number since it is a multiple of its sum of digits (36).
It is a junction number, because it is equal to n+sod(n) for n = 128955195 and 128955204.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3087 + ... + 16353.
It is an arithmetic number, because the mean of its divisors is an integer number (4527705).
Almost surely, 2128955240 is an apocalyptic number.
128955240 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 128955240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217329840).
128955240 is an abundant number, since it is smaller than the sum of its proper divisors (305704440).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
128955240 is a wasteful number, since it uses less digits than its factorization.
128955240 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 13293 (or 13277 counting only the distinct ones).
The product of its (nonzero) digits is 28800, while the sum is 36.
The square root of 128955240 is about 11355.8460715175. The cubic root of 128955240 is about 505.2189881207.
The spelling of 128955240 in words is "one hundred twenty-eight million, nine hundred fifty-five thousand, two hundred forty".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.068 sec. • engine limits •