| Base | Representation |
|---|---|
| bin | 101001011001101… |
| … | …1011011101100100 |
| 3 | 10120211001100201100 |
| 4 | 1102303123131210 |
| 5 | 10321114313130 |
| 6 | 345503400100 |
| 7 | 46266056151 |
| oct | 12263333544 |
| 9 | 3524040640 |
| 10 | 1389213540 |
| 11 | 6531a1770 |
| 12 | 3292b3030 |
| 13 | 191a72c60 |
| 14 | d2705228 |
| 15 | 81e63c60 |
| hex | 52cdb764 |
1389213540 has 288 divisors, whose sum is σ = 5113285632. Its totient is φ = 300672000.
The previous prime is 1389213521. The next prime is 1389213559. The reversal of 1389213540 is 453129831.
1389213540 is a `hidden beast` number, since 13 + 8 + 92 + 13 + 540 = 666.
It is an interprime number because it is at equal distance from previous prime (1389213521) and next prime (1389213559).
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 = 1389213495 and 1389213504.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 797070 + ... + 798810.
It is an arithmetic number, because the mean of its divisors is an integer number (17754464).
Almost surely, 21389213540 is an apocalyptic number.
1389213540 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 1389213540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2556642816).
1389213540 is an abundant number, since it is smaller than the sum of its proper divisors (3724072092).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1389213540 is a wasteful number, since it uses less digits than its factorization.
1389213540 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1811 (or 1806 counting only the distinct ones).
The product of its (nonzero) digits is 25920, while the sum is 36.
The square root of 1389213540 is about 37272.1550222146. The cubic root of 1389213540 is about 1115.8085095581.
The spelling of 1389213540 in words is "one billion, three hundred eighty-nine million, two hundred thirteen thousand, five hundred forty".
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