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13078472 = 2311331449
BaseRepresentation
bin110001111000…
…111111001000
3220121110021212
4301320333020
511322002342
61144152252
7216110441
oct61707710
926543255
1013078472
117423060
124468688
13292bb54
141a462c8
151235182
hexc78fc8

13078472 has 32 divisors (see below), whose sum is σ = 26892000. Its totient is φ = 5913600.

The previous prime is 13078459. The next prime is 13078477. The reversal of 13078472 is 27487031.

It is a happy number.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (13078477) 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 7 ways as a sum of consecutive naturals, for example, 28904 + ... + 29352.

It is an arithmetic number, because the mean of its divisors is an integer number (840375).

Almost surely, 213078472 is an apocalyptic number.

It is an amenable number.

13078472 is an abundant number, since it is smaller than the sum of its proper divisors (13813528).

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

13078472 is a wasteful number, since it uses less digits than its factorization.

13078472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797 (or 793 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 13078472 is about 3616.4170113525. The cubic root of 13078472 is about 235.6056326559.

It can be divided in two parts, 1307 and 8472, that added together give a palindrome (9779).

The spelling of 13078472 in words is "thirteen million, seventy-eight thousand, four hundred seventy-two".

Divisors: 1 2 4 8 11 22 44 88 331 449 662 898 1324 1796 2648 3592 3641 4939 7282 9878 14564 19756 29128 39512 148619 297238 594476 1188952 1634809 3269618 6539236 13078472