| Base | Representation |
|---|---|
| bin | 110010010111010… |
| … | …1001001110000000 |
| 3 | 11100202221022021210 |
| 4 | 1210232221032000 |
| 5 | 11430111332211 |
| 6 | 435405250120 |
| 7 | 56610221115 |
| oct | 14456511600 |
| 9 | 4322838253 |
| 10 | 1689949056 |
| 11 | 797a28814 |
| 12 | 3b1b63940 |
| 13 | 20c16a773 |
| 14 | 12062a90c |
| 15 | 9d56a9a6 |
| hex | 64ba9380 |
1689949056 has 128 divisors (see below), whose sum is σ = 4811788800. Its totient is φ = 523624448.
The previous prime is 1689949049. The next prime is 1689949057. The reversal of 1689949056 is 6509499861.
It is a tau number, because it is divible by the number of its divisors (128).
It is a super-2 number, since 2×16899490562 = 5711855623750582272, which contains 22 as substring.
It is a junction number, because it is equal to n+sod(n) for n = 1689948987 and 1689949005.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1689949057) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 540265 + ... + 543383.
It is an arithmetic number, because the mean of its divisors is an integer number (37592100).
Almost surely, 21689949056 is an apocalyptic number.
1689949056 is a gapful number since it is divisible by the number (16) 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 1689949056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2405894400).
1689949056 is an abundant number, since it is smaller than the sum of its proper divisors (3121839744).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1689949056 is a wasteful number, since it uses less digits than its factorization.
1689949056 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 3236 (or 3224 counting only the distinct ones).
The product of its (nonzero) digits is 4199040, while the sum is 57.
The square root of 1689949056 is about 41108.9899656997. The cubic root of 1689949056 is about 1191.1264563669.
The spelling of 1689949056 in words is "one billion, six hundred eighty-nine million, nine hundred forty-nine thousand, fifty-six".
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