Search a number
-
+
72071216 = 247643493
BaseRepresentation
bin1000100101110…
…11100000110000
312000121121010022
410102323200300
5121422234331
611052423012
71533411110
oct422734060
9160547108
1072071216
1137756198
1220177a68
1311c154b9
149801040
1564d967b
hex44bb830

72071216 has 20 divisors (see below), whose sum is σ = 159586512. Its totient is φ = 30887616.

The previous prime is 72071203. The next prime is 72071231. The reversal of 72071216 is 61217027.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321635 + ... + 321858.

Almost surely, 272071216 is an apocalyptic number.

It is an amenable number.

72071216 is an abundant number, since it is smaller than the sum of its proper divisors (87515296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72071216 is a wasteful number, since it uses less digits than its factorization.

72071216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643508 (or 643502 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 72071216 is about 8489.4767801084. The cubic root of 72071216 is about 416.1538816804.

The spelling of 72071216 in words is "seventy-two million, seventy-one thousand, two hundred sixteen".

Divisors: 1 2 4 7 8 14 16 28 56 112 643493 1286986 2573972 4504451 5147944 9008902 10295888 18017804 36035608 72071216