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16672216 = 23112947139
BaseRepresentation
bin111111100110…
…010111011000
31011101000222111
4333212113120
513232002331
61353202104
7261466021
oct77462730
934330874
1016672216
1194580a0
125700334
1335b9822
1422ddc48
1516e4db1
hexfe65d8

16672216 has 64 divisors (see below), whose sum is σ = 36288000. Its totient is φ = 7109760.

The previous prime is 16672207. The next prime is 16672231. The reversal of 16672216 is 61227661.

It is a happy number.

It is a congruent number.

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, 119875 + ... + 120013.

It is an arithmetic number, because the mean of its divisors is an integer number (567000).

It is a vampire number, since it can be written as 27266116 (with its own digits).

Almost surely, 216672216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16672216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18144000).

16672216 is an abundant number, since it is smaller than the sum of its proper divisors (19615784).

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

16672216 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (16672215) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (232).

16672216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232 (or 228 counting only the distinct ones).

The product of its digits is 6048, while the sum is 31.

The square root of 16672216 is about 4083.1624998278. The cubic root of 16672216 is about 255.4648243618.

Adding to 16672216 its reverse (61227661), we get a palindrome (77899877).

It can be divided in two parts, 1667 and 2216, that added together give a palindrome (3883).

The spelling of 16672216 in words is "sixteen million, six hundred seventy-two thousand, two hundred sixteen".

Divisors: 1 2 4 8 11 22 29 44 47 58 88 94 116 139 188 232 278 319 376 517 556 638 1034 1112 1276 1363 1529 2068 2552 2726 3058 4031 4136 5452 6116 6533 8062 10904 12232 13066 14993 16124 26132 29986 32248 44341 52264 59972 71863 88682 119944 143726 177364 189457 287452 354728 378914 574904 757828 1515656 2084027 4168054 8336108 16672216