| Base | Representation |
|---|---|
| bin | 10000111101101… |
| … | …11100101100000 |
| 3 | 100220210002020200 |
| 4 | 20132313211200 |
| 5 | 242412402403 |
| 6 | 22042105200 |
| 7 | 3345420111 |
| oct | 1036674540 |
| 9 | 326702220 |
| 10 | 142309728 |
| 11 | 7336a450 |
| 12 | 3b7ab200 |
| 13 | 23638752 |
| 14 | 14c86208 |
| 15 | c760ca3 |
| hex | 87b7960 |
142309728 has 144 divisors (see below), whose sum is σ = 457002000. Its totient is φ = 41610240.
The previous prime is 142309681. The next prime is 142309781. The reversal of 142309728 is 827903241.
142309728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a tau number, because it is divible by the number of its divisors (144).
It is a super-4 number, since 4×1423097284 (a number of 34 digits) contains 4444 as substring.
It is a Harshad number since it is a multiple of its sum of digits (36).
It is a junction number, because it is equal to n+sod(n) for n = 142309692 and 142309701.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91098 + ... + 92646.
It is an arithmetic number, because the mean of its divisors is an integer number (3173625).
Almost surely, 2142309728 is an apocalyptic number.
142309728 is a gapful number since it is divisible by the number (18) 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 142309728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228501000).
142309728 is an abundant number, since it is smaller than the sum of its proper divisors (314692272).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
142309728 is a wasteful number, since it uses less digits than its factorization.
142309728 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1605 (or 1594 counting only the distinct ones).
The product of its (nonzero) digits is 24192, while the sum is 36.
The square root of 142309728 is about 11929.3641071098. The cubic root of 142309728 is about 522.0893844380.
The spelling of 142309728 in words is "one hundred forty-two million, three hundred nine thousand, seven hundred twenty-eight".
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