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12870460 = 225643523
BaseRepresentation
bin110001000110…
…001100111100
3220012212221201
4301012030330
511243323320
61135505244
7214253131
oct61061474
926185851
1012870460
1172a0849
124388224
132888275
1419d0588
1511e370a
hexc4633c

12870460 has 12 divisors (see below), whose sum is σ = 27028008. Its totient is φ = 5148176.

The previous prime is 12870457. The next prime is 12870469. The reversal of 12870460 is 6407821.

It is a super-2 number, since 2×128704602 = 331297481223200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12870469) by changing a digit.

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, 321742 + ... + 321781.

It is an arithmetic number, because the mean of its divisors is an integer number (2252334).

Almost surely, 212870460 is an apocalyptic number.

12870460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12870460 is an abundant number, since it is smaller than the sum of its proper divisors (14157548).

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

12870460 is a wasteful number, since it uses less digits than its factorization.

12870460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643532 (or 643530 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 12870460 is about 3587.5423342450. The cubic root of 12870460 is about 234.3498553173.

The spelling of 12870460 in words is "twelve million, eight hundred seventy thousand, four hundred sixty".

Divisors: 1 2 4 5 10 20 643523 1287046 2574092 3217615 6435230 12870460