| Base | Representation |
|---|---|
| bin | 101001001011110… |
| … | …1001010100100000 |
| 3 | 10120022100022221200 |
| 4 | 1102113221110200 |
| 5 | 10312233232042 |
| 6 | 345043321200 |
| 7 | 46150133142 |
| oct | 12227512440 |
| 9 | 3508308850 |
| 10 | 1381930272 |
| 11 | 64a077738 |
| 12 | 326980200 |
| 13 | 1903c2b28 |
| 14 | d176ac92 |
| 15 | 814c5c4c |
| hex | 525e9520 |
1381930272 has 144 divisors (see below), whose sum is σ = 4304958840. Its totient is φ = 418553856.
The previous prime is 1381930261. The next prime is 1381930283. The reversal of 1381930272 is 2720391831.
1381930272 is a `hidden beast` number, since 1 + 381 + 9 + 3 + 0 + 272 = 666.
It is an interprime number because it is at equal distance from previous prime (1381930261) and next prime (1381930283).
It can be written as a sum of positive squares in 4 ways, for example, as 1381162896 + 767376 = 37164^2 + 876^2 .
It is a tau number, because it is divible by the number of its divisors (144).
It is a Harshad number since it is a multiple of its sum of digits (36).
It is an unprimeable number.
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 23 ways as a sum of consecutive naturals, for example, 137118 + ... + 146850.
Almost surely, 21381930272 is an apocalyptic number.
1381930272 is a gapful number since it is divisible by the number (12) 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 1381930272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2152479420).
1381930272 is an abundant number, since it is smaller than the sum of its proper divisors (2923028568).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1381930272 is a wasteful number, since it uses less digits than its factorization.
1381930272 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 9795 (or 9784 counting only the distinct ones).
The product of its (nonzero) digits is 18144, while the sum is 36.
The square root of 1381930272 is about 37174.3227510603. The cubic root of 1381930272 is about 1113.8551319170.
The spelling of 1381930272 in words is "one billion, three hundred eighty-one million, nine hundred thirty thousand, two hundred seventy-two".
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