| Base | Representation |
|---|---|
| bin | 1110101111000… |
| … | …1011010100000 |
| 3 | 11022022002020000 |
| 4 | 3223301122200 |
| 5 | 111310244430 |
| 6 | 10044420000 |
| 7 | 1350226056 |
| oct | 353613240 |
| 9 | 138262200 |
| 10 | 61806240 |
| 11 | 31984a41 |
| 12 | 18847600 |
| 13 | ca60152 |
| 14 | 82cc1d6 |
| 15 | 565ce60 |
| hex | 3af16a0 |
61806240 has 240 divisors, whose sum is σ = 230519520. Its totient is φ = 15552000.
The previous prime is 61806233. The next prime is 61806257. The reversal of 61806240 is 4260816.
61806240 is a `hidden beast` number, since 618 + 0 + 6 + 2 + 40 = 666.
61806240 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 (240).
It is a super-2 number, since 2×618062402 = 7640022605875200, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (27).
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 246115 + ... + 246365.
It is an arithmetic number, because the mean of its divisors is an integer number (960498).
Almost surely, 261806240 is an apocalyptic number.
61806240 is a gapful number since it is divisible by the number (60) 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 61806240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115259760).
61806240 is an abundant number, since it is smaller than the sum of its proper divisors (168713280).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
61806240 is a wasteful number, since it uses less digits than its factorization.
61806240 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 297 (or 280 counting only the distinct ones).
The product of its (nonzero) digits is 2304, while the sum is 27.
The square root of 61806240 is about 7861.6944738396. The cubic root of 61806240 is about 395.3764290627.
The spelling of 61806240 in words is "sixty-one million, eight hundred six thousand, two hundred forty".
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