Base | Representation |
---|---|
bin | 1000101010101… |
… | …11111000110010 |
3 | 12001211010202001 |
4 | 10111113320302 |
5 | 122103233410 |
6 | 11114244214 |
7 | 1542016360 |
oct | 425277062 |
9 | 161733661 |
10 | 72711730 |
11 | 38053443 |
12 | 2042666a |
13 | 120aabc0 |
14 | 992a630 |
15 | 65b433a |
hex | 4557e32 |
72711730 has 32 divisors (see below), whose sum is σ = 161086464. Its totient is φ = 23011776.
The previous prime is 72711713. The next prime is 72711757. The reversal of 72711730 is 3711727.
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, 39042 + ... + 40861.
It is an arithmetic number, because the mean of its divisors is an integer number (5033952).
Almost surely, 272711730 is an apocalyptic number.
72711730 is a gapful number since it is divisible by the number (70) formed by its first and last digit.
72711730 is an abundant number, since it is smaller than the sum of its proper divisors (88374734).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
72711730 is a wasteful number, since it uses less digits than its factorization.
72711730 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 79930.
The product of its (nonzero) digits is 2058, while the sum is 28.
The square root of 72711730 is about 8527.1173323697. The cubic root of 72711730 is about 417.3830669215.
It can be divided in two parts, 72711 and 730, that added together give a square (73441 = 2712).
The spelling of 72711730 in words is "seventy-two million, seven hundred eleven thousand, seven hundred thirty".
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