| Base | Representation |
|---|---|
| bin | 111010111011011… |
| … | …1001110001100110 |
| 3 | 12002210200121022000 |
| 4 | 1311312321301212 |
| 5 | 13022143423234 |
| 6 | 524112550130 |
| 7 | 66666666600 |
| oct | 16566716146 |
| 9 | 5083617260 |
| 10 | 1977326694 |
| 11 | 9251708a2 |
| 12 | 472252346 |
| 13 | 2568691c5 |
| 14 | 14a876170 |
| 15 | b88d4899 |
| hex | 75db9c66 |
1977326694 has 192 divisors, whose sum is σ = 5531097600. Its totient is φ = 520261056.
The previous prime is 1977326693. The next prime is 1977326699. The reversal of 1977326694 is 4966237791.
It is a happy number.
It is a Harshad number since it is a multiple of its sum of digits (54).
It is a nialpdrome in base 7.
It is a zygodrome in base 7.
It is a self number, because there is not a number n which added to its sum of digits gives 1977326694.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1977326693) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (19) of ones.
It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1859607 + ... + 1860669.
It is an arithmetic number, because the mean of its divisors is an integer number (28807800).
Almost surely, 21977326694 is an apocalyptic number.
1977326694 is a gapful number since it is divisible by the number (14) formed by its first and last digit.
It is a practical number, because each smaller number is the sum of distinct divisors of 1977326694, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2765548800).
1977326694 is an abundant number, since it is smaller than the sum of its proper divisors (3553770906).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1977326694 is a wasteful number, since it uses less digits than its factorization.
1977326694 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1144 (or 1131 counting only the distinct ones).
The product of its digits is 3429216, while the sum is 54.
The square root of 1977326694 is about 44467.1417340940. The cubic root of 1977326694 is about 1255.1418481700.
The spelling of 1977326694 in words is "one billion, nine hundred seventy-seven million, three hundred twenty-six thousand, six hundred ninety-four".
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