Base | Representation |
---|---|
bin | 111011000000100… |
… | …011001101110110 |
3 | 2112222212012200022 |
4 | 323000203031312 |
5 | 4011414444430 |
6 | 242123045142 |
7 | 33350601230 |
oct | 7300431566 |
9 | 2488765608 |
10 | 989999990 |
11 | 468913711 |
12 | 2376707b2 |
13 | 12a148615 |
14 | 956a7250 |
15 | 5bda84e5 |
hex | 3b023376 |
989999990 has 32 divisors (see below), whose sum is σ = 2038155264. Its totient is φ = 339164640.
The previous prime is 989999957. The next prime is 989999993. The reversal of 989999990 is 99999989.
989999990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (989999993) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99335 + ... + 108845.
It is an arithmetic number, because the mean of its divisors is an integer number (63692352).
Almost surely, 2989999990 is an apocalyptic number.
989999990 is an abundant number, since it is smaller than the sum of its proper divisors (1048155274).
989999990 is a wasteful number, since it uses less digits than its factorization.
989999990 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 11012.
The product of its (nonzero) digits is 38263752, while the sum is 71.
The square root of 989999990 is about 31464.2652861941. The cubic root of 989999990 is about 996.6554900569.
The spelling of 989999990 in words is "nine hundred eighty-nine million, nine hundred ninety-nine thousand, nine hundred ninety".
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