| Base | Representation |
|---|---|
| bin | 101000110110001… |
| … | …000010111011100 |
| 3 | 1202202110202122000 |
| 4 | 220312020113130 |
| 5 | 2400412404214 |
| 6 | 151555522300 |
| 7 | 22660526016 |
| oct | 5066102734 |
| 9 | 1682422560 |
| 10 | 685278684 |
| 11 | 321905022 |
| 12 | 1715b9390 |
| 13 | abc8685c |
| 14 | 670251b6 |
| 15 | 40265809 |
| hex | 28d885dc |
685278684 has 96 divisors (see below), whose sum is σ = 1845043200. Its totient is φ = 219723840.
The previous prime is 685278679. The next prime is 685278689. The reversal of 685278684 is 486872586.
It is an interprime number because it is at equal distance from previous prime (685278679) and next prime (685278689).
It is a Harshad number since it is a multiple of its sum of digits (54).
Its product of digits (5160960) is a multiple of the sum of its prime factors (1280).
It is a self number, because there is not a number n which added to its sum of digits gives 685278684.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (685278689) by changing a digit.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 659037 + ... + 660075.
It is an arithmetic number, because the mean of its divisors is an integer number (19219200).
Almost surely, 2685278684 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 685278684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (922521600).
685278684 is an abundant number, since it is smaller than the sum of its proper divisors (1159764516).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
685278684 is a wasteful number, since it uses less digits than its factorization.
685278684 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1280 (or 1272 counting only the distinct ones).
The product of its digits is 5160960, while the sum is 54.
The square root of 685278684 is about 26177.8280993668. The cubic root of 685278684 is about 881.6355104613.
It can be divided in two parts, 68527868 and 4, that multiplied together give a palindrome (274111472).
The spelling of 685278684 in words is "six hundred eighty-five million, two hundred seventy-eight thousand, six hundred eighty-four".
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