| Base | Representation |
|---|---|
| bin | 11000010100100… |
| … | …01110111111000 |
| 3 | 112012220100112020 |
| 4 | 30022101313320 |
| 5 | 404212134430 |
| 6 | 32124514440 |
| 7 | 5025103053 |
| oct | 1412216770 |
| 9 | 465810466 |
| 10 | 204021240 |
| 11 | a518a1a5 |
| 12 | 583aba20 |
| 13 | 33364737 |
| 14 | 1d14ba9a |
| 15 | 12da0b10 |
| hex | c291df8 |
204021240 has 128 divisors (see below), whose sum is σ = 659577600. Its totient is φ = 50319360.
The previous prime is 204021229. The next prime is 204021241. The reversal of 204021240 is 42120402.
204021240 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.
It is a super-2 number, since 2×2040212402 = 83249332742275200, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (15).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (204021241) by changing a digit.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97000 + ... + 99080.
It is an arithmetic number, because the mean of its divisors is an integer number (5152950).
Almost surely, 2204021240 is an apocalyptic number.
204021240 is a gapful number since it is divisible by the number (20) 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 204021240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (329788800).
204021240 is an abundant number, since it is smaller than the sum of its proper divisors (455556360).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
204021240 is a wasteful number, since it uses less digits than its factorization.
204021240 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2157 (or 2153 counting only the distinct ones).
The product of its (nonzero) digits is 128, while the sum is 15.
The square root of 204021240 is about 14283.6003864572. The cubic root of 204021240 is about 588.6969615178.
Adding to 204021240 its reverse (42120402), we get a palindrome (246141642).
The spelling of 204021240 in words is "two hundred four million, twenty-one thousand, two hundred forty".
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