| Base | Representation |
|---|---|
| bin | 110010011010001… |
| … | …1010011101000000 |
| 3 | 11100212210010220000 |
| 4 | 1210310122131000 |
| 5 | 11431003231230 |
| 6 | 435501520000 |
| 7 | 56626120314 |
| oct | 14464323500 |
| 9 | 4325703800 |
| 10 | 1691461440 |
| 11 | 798871019 |
| 12 | 3b2573000 |
| 13 | 20c579c76 |
| 14 | 120901b44 |
| 15 | 9d768b60 |
| hex | 64d1a740 |
1691461440 has 140 divisors (see below), whose sum is σ = 6016918116. Its totient is φ = 451049472.
The previous prime is 1691461411. The next prime is 1691461441. The reversal of 1691461440 is 441641961.
It can be written as a sum of positive squares in 2 ways, for example, as 400640256 + 1290821184 = 20016^2 + 35928^2 .
It is a super-2 number, since 2×16914614402 = 5722083606013747200, which contains 22 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 = 1691461395 and 1691461404.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1691461441) 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 19 ways as a sum of consecutive naturals, for example, 6709 + ... + 58548.
Almost surely, 21691461440 is an apocalyptic number.
1691461440 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 1691461440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3008459058).
1691461440 is an abundant number, since it is smaller than the sum of its proper divisors (4325456676).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1691461440 is an equidigital number, since it uses as much as digits as its factorization.
1691461440 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 65286 (or 65267 counting only the distinct ones).
The product of its (nonzero) digits is 20736, while the sum is 36.
The square root of 1691461440 is about 41127.3806605770. The cubic root of 1691461440 is about 1191.4816748607.
The spelling of 1691461440 in words is "one billion, six hundred ninety-one million, four hundred sixty-one thousand, four hundred forty".
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