| Base | Representation |
|---|---|
| bin | 111010010010… |
| … | …0000111110000 |
| 3 | 2010111102212000 |
| 4 | 1310210013300 |
| 5 | 30310303111 |
| 6 | 3010534000 |
| 7 | 520504314 |
| oct | 164440760 |
| 9 | 63442760 |
| 10 | 30556656 |
| 11 | 16280739 |
| 12 | a297300 |
| 13 | 643b480 |
| 14 | 40b5b44 |
| 15 | 2a38c56 |
| hex | 1d241f0 |
30556656 has 80 divisors (see below), whose sum is σ = 94473120. Its totient is φ = 9400320.
The previous prime is 30556651. The next prime is 30556661. The reversal of 30556656 is 65665503.
It is a happy number.
It is an interprime number because it is at equal distance from previous prime (30556651) and next prime (30556661).
It is a Harshad number since it is a multiple of its sum of digits (36).
It is a self number, because there is not a number n which added to its sum of digits gives 30556656.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (30556651) 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 15 ways as a sum of consecutive naturals, for example, 2896 + ... + 8336.
It is an arithmetic number, because the mean of its divisors is an integer number (1180914).
Almost surely, 230556656 is an apocalyptic number.
30556656 is a gapful number since it is divisible by the number (36) 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 30556656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47236560).
30556656 is an abundant number, since it is smaller than the sum of its proper divisors (63916464).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
30556656 is a wasteful number, since it uses less digits than its factorization.
30556656 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 5471 (or 5459 counting only the distinct ones).
The product of its (nonzero) digits is 81000, while the sum is 36.
The square root of 30556656 is about 5527.8075219747. The cubic root of 30556656 is about 312.6333289201.
The spelling of 30556656 in words is "thirty million, five hundred fifty-six thousand, six hundred fifty-six".
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