Base | Representation |
---|---|
bin | 1001011001100… |
… | …11110011100100 |
3 | 12111101021021020 |
4 | 10230303303210 |
5 | 130141333041 |
6 | 11454051140 |
7 | 1645155054 |
oct | 454636344 |
9 | 174337236 |
10 | 78855396 |
11 | 4056a254 |
12 | 224a9ab0 |
13 | 1344c3c9 |
14 | a689564 |
15 | 6dc9866 |
hex | 4b33ce4 |
78855396 has 72 divisors (see below), whose sum is σ = 197144640. Its totient is φ = 24525504.
The previous prime is 78855391. The next prime is 78855451. The reversal of 78855396 is 69355887.
It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.
Its product of digits (1814400) is a multiple of the sum of its prime divisors (300).
It is not an unprimeable number, because it can be changed into a prime (78855391) by changing a digit.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 472105 + ... + 472271.
It is an arithmetic number, because the mean of its divisors is an integer number (2738120).
Almost surely, 278855396 is an apocalyptic number.
78855396 is a gapful number since it is divisible by the number (76) 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 78855396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98572320).
78855396 is an abundant number, since it is smaller than the sum of its proper divisors (118289244).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
78855396 is a wasteful number, since it uses less digits than its factorization.
78855396 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 321 (or 300 counting only the distinct ones).
The product of its digits is 1814400, while the sum is 51.
The square root of 78855396 is about 8880.0560809040. The cubic root of 78855396 is about 428.8220799803.
The spelling of 78855396 in words is "seventy-eight million, eight hundred fifty-five thousand, three hundred ninety-six".
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