| Base | Representation |
|---|---|
| bin | 101001000110001… |
| … | …0100001100011011 |
| 3 | 10120002202102201100 |
| 4 | 1102030110030123 |
| 5 | 10311003211110 |
| 6 | 344455522443 |
| 7 | 46112652666 |
| oct | 12214241433 |
| 9 | 3502672640 |
| 10 | 1378960155 |
| 11 | 6484291a1 |
| 12 | 325989423 |
| 13 | 18c8c2c71 |
| 14 | d11d66dd |
| 15 | 810dabc0 |
| hex | 5231431b |
1378960155 has 12 divisors (see below), whose sum is σ = 2390197680. Its totient is φ = 735445392.
The previous prime is 1378960153. The next prime is 1378960159. The reversal of 1378960155 is 5510698731.
It is a happy number.
1378960155 is a `hidden beast` number, since 1 + 37 + 8 + 9 + 601 + 5 + 5 = 666.
It is not a de Polignac number, because 1378960155 - 21 = 1378960153 is a prime.
It is a super-2 number, since 2×13789601552 = 3803062218155248050, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 30643559 = 1378960155 / (1 + 3 + 7 + 8 + 9 + 6 + 0 + 1 + 5 + 5).
It is a self number, because there is not a number n which added to its sum of digits gives 1378960155.
It is not an unprimeable number, because it can be changed into a prime (1378960153) by changing a digit.
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 11 ways as a sum of consecutive naturals, for example, 15321735 + ... + 15321824.
It is an arithmetic number, because the mean of its divisors is an integer number (199183140).
Almost surely, 21378960155 is an apocalyptic number.
1378960155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.
1378960155 is a deficient number, since it is larger than the sum of its proper divisors (1011237525).
1378960155 is a wasteful number, since it uses less digits than its factorization.
1378960155 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 30643570 (or 30643567 counting only the distinct ones).
The product of its (nonzero) digits is 226800, while the sum is 45.
The square root of 1378960155 is about 37134.3527612910. The cubic root of 1378960155 is about 1113.0565742585.
The spelling of 1378960155 in words is "one billion, three hundred seventy-eight million, nine hundred sixty thousand, one hundred fifty-five".
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