| Base | Representation |
|---|---|
| bin | 101010011010001… |
| … | …1001010111010000 |
| 3 | 10200011122222112202 |
| 4 | 1110310121113100 |
| 5 | 10403243142040 |
| 6 | 353112142332 |
| 7 | 50156324534 |
| oct | 12464312720 |
| 9 | 3604588482 |
| 10 | 1423021520 |
| 11 | 670293148 |
| 12 | 3386979a8 |
| 13 | 198a7c28b |
| 14 | d6dc5bc4 |
| 15 | 84de1015 |
| hex | 54d195d0 |
1423021520 has 80 divisors (see below), whose sum is σ = 3439065600. Its totient is φ = 547008000.
The previous prime is 1423021519. The next prime is 1423021541. The reversal of 1423021520 is 251203241.
It is a tau number, because it is divible by the number of its divisors (80).
It is a super-2 number, since 2×14230215202 = 4049980492766220800, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (20).
It is a junction number, because it is equal to n+sod(n) for n = 1423021492 and 1423021501.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 367595 + ... + 371445.
It is an arithmetic number, because the mean of its divisors is an integer number (42988320).
Almost surely, 21423021520 is an apocalyptic number.
1423021520 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 1423021520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1719532800).
1423021520 is an abundant number, since it is smaller than the sum of its proper divisors (2016044080).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1423021520 is a wasteful number, since it uses less digits than its factorization.
1423021520 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 4044 (or 4038 counting only the distinct ones).
The product of its (nonzero) digits is 480, while the sum is 20.
The square root of 1423021520 is about 37722.9574662433. The cubic root of 1423021520 is about 1124.7875206945.
Adding to 1423021520 its reverse (251203241), we get a palindrome (1674224761).
The spelling of 1423021520 in words is "one billion, four hundred twenty-three million, twenty-one thousand, five hundred twenty".
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