Base | Representation |
---|---|
bin | 11100110100011001110… |
… | …00000110000010110100 |
3 | 10111122220011021022211020 |
4 | 32122030320012002310 |
5 | 112210420213240030 |
6 | 2034521102541140 |
7 | 131353141032120 |
oct | 16321470060264 |
9 | 3448804238736 |
10 | 990205993140 |
11 | 351a42517651 |
12 | 13baa9b977b0 |
13 | 724b7183500 |
14 | 35cd77c6580 |
15 | 1ab569e8510 |
hex | e68ce060b4 |
990205993140 has 288 divisors, whose sum is σ = 3504166686720. Its totient is φ = 204476732928.
The previous prime is 990205993111. The next prime is 990205993159. The reversal of 990205993140 is 41399502099.
It is a happy number.
It is a congruent number.
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 95 ways as a sum of consecutive naturals, for example, 3187651 + ... + 3484469.
It is an arithmetic number, because the mean of its divisors is an integer number (12167245440).
Almost surely, 2990205993140 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 990205993140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1752083343360).
990205993140 is an abundant number, since it is smaller than the sum of its proper divisors (2513960693580).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
990205993140 is a wasteful number, since it uses less digits than its factorization.
990205993140 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 296911 (or 296896 counting only the distinct ones).
The product of its (nonzero) digits is 787320, while the sum is 51.
The spelling of 990205993140 in words is "nine hundred ninety billion, two hundred five million, nine hundred ninety-three thousand, one hundred forty".
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