| Base | Representation |
|---|---|
| bin | 101001001100110… |
| … | …0101101101100100 |
| 3 | 10120100022012212100 |
| 4 | 1102121211231210 |
| 5 | 10312401033110 |
| 6 | 345102252100 |
| 7 | 46154354451 |
| oct | 12231455544 |
| 9 | 3510265770 |
| 10 | 1382439780 |
| 11 | 64a395517 |
| 12 | 326b87030 |
| 13 | 190540a07 |
| 14 | d1860828 |
| 15 | 81576bc0 |
| hex | 52665b64 |
1382439780 has 72 divisors (see below), whose sum is σ = 4205473272. Its totient is φ = 367589376.
The previous prime is 1382439749. The next prime is 1382439781. The reversal of 1382439780 is 879342831.
1382439780 is a `hidden beast` number, since 138 + 2 + 439 + 7 + 80 = 666.
It can be written as a sum of positive squares in 4 ways, for example, as 346629924 + 1035809856 = 18618^2 + 32184^2 .
It is a super-2 number, since 2×13824397802 = 3822279490652896800, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (45).
It is not an unprimeable number, because it can be changed into a prime (1382439781) by changing a digit.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52662 + ... + 74418.
It is an arithmetic number, because the mean of its divisors is an integer number (58409351).
Almost surely, 21382439780 is an apocalyptic number.
1382439780 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 1382439780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2102736636).
1382439780 is an abundant number, since it is smaller than the sum of its proper divisors (2823033492).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1382439780 is a wasteful number, since it uses less digits than its factorization.
1382439780 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 22125 (or 22120 counting only the distinct ones).
The product of its (nonzero) digits is 290304, while the sum is 45.
The square root of 1382439780 is about 37181.1750755675. The cubic root of 1382439780 is about 1113.9920052889.
The spelling of 1382439780 in words is "one billion, three hundred eighty-two million, four hundred thirty-nine thousand, seven hundred eighty".
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