Base | Representation |
---|---|
bin | 1000100100110… |
… | …11001111111110 |
3 | 12000100212212000 |
4 | 10102123033332 |
5 | 121404022240 |
6 | 11045523130 |
7 | 1532320620 |
oct | 422331776 |
9 | 160325760 |
10 | 71939070 |
11 | 37675985 |
12 | 201134a6 |
13 | 11b9a2c8 |
14 | 97a8c10 |
15 | 64b0430 |
hex | 449b3fe |
71939070 has 128 divisors (see below), whose sum is σ = 232243200. Its totient is φ = 15469056.
The previous prime is 71939057. The next prime is 71939071. The reversal of 71939070 is 7093917.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (71939071) by changing a digit.
It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 31011 + ... + 33249.
It is an arithmetic number, because the mean of its divisors is an integer number (1814400).
Almost surely, 271939070 is an apocalyptic number.
71939070 is a gapful number since it is divisible by the number (70) formed by its first and last digit.
It is a practical number, because each smaller number is the sum of distinct divisors of 71939070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116121600).
71939070 is an abundant number, since it is smaller than the sum of its proper divisors (160304130).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
71939070 is a wasteful number, since it uses less digits than its factorization.
71939070 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2279 (or 2273 counting only the distinct ones).
The product of its (nonzero) digits is 11907, while the sum is 36.
The square root of 71939070 is about 8481.6902796553. The cubic root of 71939070 is about 415.8993800963.
The spelling of 71939070 in words is "seventy-one million, nine hundred thirty-nine thousand, seventy".
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