Base | Representation |
---|---|
bin | 1000100101101… |
… | …00110011111010 |
3 | 12000120012110210 |
4 | 10102310303322 |
5 | 121420400040 |
6 | 11052051550 |
7 | 1533235101 |
oct | 422646372 |
9 | 160505423 |
10 | 72043770 |
11 | 37737607 |
12 | 20163bb6 |
13 | 11c05b66 |
14 | 97d5038 |
15 | 64d1480 |
hex | 44b4cfa |
72043770 has 32 divisors (see below), whose sum is σ = 173420352. Its totient is φ = 19154432.
The previous prime is 72043759. The next prime is 72043781. The reversal of 72043770 is 7734027.
It is a happy number.
It is an interprime number because it is at equal distance from previous prime (72043759) and next prime (72043781).
It is a Harshad number since it is a multiple of its sum of digits (30).
It is an unprimeable number.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7189 + ... + 13991.
It is an arithmetic number, because the mean of its divisors is an integer number (5419386).
Almost surely, 272043770 is an apocalyptic number.
72043770 is an abundant number, since it is smaller than the sum of its proper divisors (101376582).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
72043770 is a wasteful number, since it uses less digits than its factorization.
72043770 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 7166.
The product of its (nonzero) digits is 8232, while the sum is 30.
The square root of 72043770 is about 8487.8601543616. The cubic root of 72043770 is about 416.1010487084.
Adding to 72043770 its reverse (7734027), we get a palindrome (79777797).
The spelling of 72043770 in words is "seventy-two million, forty-three thousand, seven hundred seventy".
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