| Base | Representation |
|---|---|
| bin | 101110001011010… |
| … | …1011100011101010 |
| 3 | 10222222120012001200 |
| 4 | 1130112223203222 |
| 5 | 11133124340300 |
| 6 | 413430025030 |
| 7 | 53253050223 |
| oct | 13426534352 |
| 9 | 3888505050 |
| 10 | 1549449450 |
| 11 | 72569533a |
| 12 | 372aa8176 |
| 13 | 1b9016bc3 |
| 14 | 109ad624a |
| 15 | 91066200 |
| hex | 5c5ab8ea |
1549449450 has 144 divisors (see below), whose sum is σ = 4302521496. Its totient is φ = 399513600.
The previous prime is 1549449431. The next prime is 1549449463. The reversal of 1549449450 is 549449451.
1549449450 is a `hidden beast` number, since 154 + 9 + 4 + 49 + 450 = 666.
It can be written as a sum of positive squares in 12 ways, for example, as 183629601 + 1365819849 = 13551^2 + 36957^2 .
It is a Harshad number since it is a multiple of its sum of digits (45).
It is a junction number, because it is equal to n+sod(n) for n = 1549449396 and 1549449405.
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 71 ways as a sum of consecutive naturals, for example, 2527344 + ... + 2527956.
Almost surely, 21549449450 is an apocalyptic number.
1549449450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is a practical number, because each smaller number is the sum of distinct divisors of 1549449450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2151260748).
1549449450 is an abundant number, since it is smaller than the sum of its proper divisors (2753072046).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1549449450 is a wasteful number, since it uses less digits than its factorization.
1549449450 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 809 (or 801 counting only the distinct ones).
The product of its (nonzero) digits is 518400, while the sum is 45.
The square root of 1549449450 is about 39363.0467570792. The cubic root of 1549449450 is about 1157.1574898535.
Subtracting from 1549449450 its reverse (549449451), we obtain a palindrome (999999999).
The spelling of 1549449450 in words is "one billion, five hundred forty-nine million, four hundred forty-nine thousand, four hundred fifty".
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