| Base | Representation |
|---|---|
| bin | 100100100110001… |
| … | …1101000011000000 |
| 3 | 10011120200221100000 |
| 4 | 1021030131003000 |
| 5 | 10003332021342 |
| 6 | 321504200000 |
| 7 | 42300561135 |
| oct | 11114350300 |
| 9 | 3146627300 |
| 10 | 1228001472 |
| 11 | 5801a1755 |
| 12 | 2a3309000 |
| 13 | 1675498b9 |
| 14 | b913c58c |
| 15 | 72c1c44c |
| hex | 4931d0c0 |
1228001472 has 126 divisors (see below), whose sum is σ = 3663245404. Its totient is φ = 407877120.
The previous prime is 1228001461. The next prime is 1228001479. The reversal of 1228001472 is 2741008221.
It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.
It is a Harshad number since it is a multiple of its sum of digits (27).
It is not an unprimeable number, because it can be changed into a prime (1228001479) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4369972 + ... + 4370252.
Almost surely, 21228001472 is an apocalyptic number.
1228001472 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 1228001472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1831622702).
1228001472 is an abundant number, since it is smaller than the sum of its proper divisors (2435243932).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1228001472 is an frugal number, since it uses more digits than its factorization.
1228001472 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 589 (or 286 counting only the distinct ones).
The product of its (nonzero) digits is 1792, while the sum is 27.
The square root of 1228001472 is about 35042.8519387335. The cubic root of 1228001472 is about 1070.8606555524.
Multiplying 1228001472 by its sum of digits (27), we get a square (33156039744 = 1820882).
1228001472 divided by its sum of digits (27) gives a square (45481536 = 67442).
Adding to 1228001472 its reverse (2741008221), we get a palindrome (3969009693).
The spelling of 1228001472 in words is "one billion, two hundred twenty-eight million, one thousand, four hundred seventy-two".
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