Base | Representation |
---|---|
bin | 1001011010000… |
… | …01101001001000 |
3 | 12111111011000100 |
4 | 10231001221020 |
5 | 130200141242 |
6 | 11455205400 |
7 | 1645512231 |
oct | 455015110 |
9 | 174434010 |
10 | 78912072 |
11 | 405a8898 |
12 | 22516860 |
13 | 1346c145 |
14 | a6a2088 |
15 | 6ddb54c |
hex | 4b41a48 |
78912072 has 48 divisors (see below), whose sum is σ = 215738640. Its totient is φ = 26055648.
The previous prime is 78912061. The next prime is 78912077. The reversal of 78912072 is 27021987.
It is a Harshad number since it is a multiple of its sum of digits (36).
It is not an unprimeable number, because it can be changed into a prime (78912077) by changing a digit.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2583 + ... + 12825.
It is an arithmetic number, because the mean of its divisors is an integer number (4494555).
Almost surely, 278912072 is an apocalyptic number.
78912072 is a gapful number since it is divisible by the number (72) 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 78912072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107869320).
78912072 is an abundant number, since it is smaller than the sum of its proper divisors (136826568).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
78912072 is a wasteful number, since it uses less digits than its factorization.
78912072 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 10362 (or 10355 counting only the distinct ones).
The product of its (nonzero) digits is 14112, while the sum is 36.
The square root of 78912072 is about 8883.2467037677. The cubic root of 78912072 is about 428.9247916148.
The spelling of 78912072 in words is "seventy-eight million, nine hundred twelve thousand, seventy-two".
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