| Base | Representation |
|---|---|
| bin | 1110110001010… |
| … | …0110111010000 |
| 3 | 11022120110101210 |
| 4 | 3230110313100 |
| 5 | 111324421230 |
| 6 | 10051500120 |
| 7 | 1351402305 |
| oct | 354246720 |
| 9 | 138513353 |
| 10 | 61951440 |
| 11 | 31a74041 |
| 12 | 188b7640 |
| 13 | cab1275 |
| 14 | 83290ac |
| 15 | 568aeb0 |
| hex | 3b14dd0 |
61951440 has 40 divisors (see below), whose sum is σ = 192050208. Its totient is φ = 16520320.
The previous prime is 61951403. The next prime is 61951441. The reversal of 61951440 is 4415916.
It is a happy number.
61951440 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 (40).
It is a super-3 number, since 3×619514403 (a number of 24 digits) contains 333 as substring.
It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.
It is a Harshad number since it is a multiple of its sum of digits (30).
It is a junction number, because it is equal to n+sod(n) for n = 61951398 and 61951407.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (61951441) by changing a digit.
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 7 ways as a sum of consecutive naturals, for example, 128826 + ... + 129305.
Almost surely, 261951440 is an apocalyptic number.
61951440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.
It is an amenable number.
61951440 is an abundant number, since it is smaller than the sum of its proper divisors (130098768).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
61951440 is a wasteful number, since it uses less digits than its factorization.
61951440 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 258147 (or 258141 counting only the distinct ones).
The product of its (nonzero) digits is 4320, while the sum is 30.
The square root of 61951440 is about 7870.9237069101. The cubic root of 61951440 is about 395.6858032176.
The spelling of 61951440 in words is "sixty-one million, nine hundred fifty-one thousand, four hundred forty".
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