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13680472 = 2313131543
BaseRepresentation
bin110100001011…
…111101011000
3221202001002011
4310023331120
512000233342
61205115304
7224165521
oct64137530
927661064
1013680472
1177a4383
1246b8b34
132aacb70
141b61848
151303717
hexd0bf58

13680472 has 16 divisors (see below), whose sum is σ = 27624240. Its totient is φ = 6314016.

The previous prime is 13680439. The next prime is 13680479. The reversal of 13680472 is 27408631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13680479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65668 + ... + 65875.

It is an arithmetic number, because the mean of its divisors is an integer number (1726515).

Almost surely, 213680472 is an apocalyptic number.

It is an amenable number.

13680472 is an abundant number, since it is smaller than the sum of its proper divisors (13943768).

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

13680472 is a wasteful number, since it uses less digits than its factorization.

13680472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131562 (or 131558 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 13680472 is about 3698.7122083233. The cubic root of 13680472 is about 239.1665068707.

It can be divided in two parts, 136 and 80472, that added together give a palindrome (80608).

The spelling of 13680472 in words is "thirteen million, six hundred eighty thousand, four hundred seventy-two".

Divisors: 1 2 4 8 13 26 52 104 131543 263086 526172 1052344 1710059 3420118 6840236 13680472