| Base | Representation |
|---|---|
| bin | 100101000001101… |
| … | …1101111011110100 |
| 3 | 10012120211121222201 |
| 4 | 1022003131323310 |
| 5 | 10021030014103 |
| 6 | 323141234244 |
| 7 | 42534264400 |
| oct | 11203357364 |
| 9 | 3176747881 |
| 10 | 1242423028 |
| 11 | 5883518a0 |
| 12 | 2a8102984 |
| 13 | 16a528b72 |
| 14 | bb014100 |
| 15 | 7411a51d |
| hex | 4a0ddef4 |
1242423028 has 72 divisors (see below), whose sum is σ = 2775929184. Its totient is φ = 481118400.
The previous prime is 1242423023. The next prime is 1242423031. The reversal of 1242423028 is 8203242421.
It is a super-2 number, since 2×12424230282 = 3087229961009377568, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (28).
It is a junction number, because it is equal to n+sod(n) for n = 1242422987 and 1242423005.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1242423023) by changing a digit.
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 23 ways as a sum of consecutive naturals, for example, 371323 + ... + 374653.
It is an arithmetic number, because the mean of its divisors is an integer number (38554572).
Almost surely, 21242423028 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 1242423028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1387964592).
1242423028 is an abundant number, since it is smaller than the sum of its proper divisors (1533506156).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1242423028 is a wasteful number, since it uses less digits than its factorization.
1242423028 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 3533 (or 3524 counting only the distinct ones).
The product of its (nonzero) digits is 6144, while the sum is 28.
The square root of 1242423028 is about 35248.0216182412. The cubic root of 1242423028 is about 1075.0363868700.
Adding to 1242423028 its reverse (8203242421), we get a palindrome (9445665449).
The spelling of 1242423028 in words is "one billion, two hundred forty-two million, four hundred twenty-three thousand, twenty-eight".
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