Base | Representation |
---|---|
bin | 1001010011100… |
… | …01000111010100 |
3 | 12102212202100211 |
4 | 10221301013110 |
5 | 124440323230 |
6 | 11425015204 |
7 | 1635324112 |
oct | 451610724 |
9 | 172782324 |
10 | 78057940 |
11 | 400750a4 |
12 | 22184504 |
13 | 1323043c |
14 | a51cab2 |
15 | 6cbd42a |
hex | 4a711d4 |
78057940 has 24 divisors (see below), whose sum is σ = 165013632. Its totient is φ = 31015200.
The previous prime is 78057919. The next prime is 78057977. The reversal of 78057940 is 4975087.
It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.
It is a junction number, because it is equal to n+sod(n) for n = 78057893 and 78057902.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9904 + ... + 15943.
It is an arithmetic number, because the mean of its divisors is an integer number (6875568).
Almost surely, 278057940 is an apocalyptic number.
It is an amenable number.
78057940 is an abundant number, since it is smaller than the sum of its proper divisors (86955692).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
78057940 is a wasteful number, since it uses less digits than its factorization.
78057940 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 26007 (or 26005 counting only the distinct ones).
The product of its (nonzero) digits is 70560, while the sum is 40.
The square root of 78057940 is about 8835.0404639707. The cubic root of 78057940 is about 427.3716359357.
The spelling of 78057940 in words is "seventy-eight million, fifty-seven thousand, nine hundred forty".
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