12728534 has 48 divisors (see below), whose sum is σ = 24399648. Its totient is φ = 4935168.

The previous prime is 12728519. The next prime is 12728539. The reversal of 12728534 is 43582721.

It is a self number, because there is not a number n which added to its sum of digits gives 12728534.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12728539) 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 23 ways as a sum of consecutive naturals, for example, 123527 + ... + 123629.

It is an arithmetic number, because the mean of its divisors is an integer number (508326).

Almost surely, 2^12728534 is an apocalyptic number.

12728534 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12728534 is a deficient number, since it is larger than the sum of its proper divisors (11671114).

12728534 is a wasteful number, since it uses less digits than its factorization.

12728534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229 (or 222 counting only the distinct ones).

The product of its digits is 13440, while the sum is 32.

The square root of 12728534 is about 3567.7071068124. The cubic root of 12728534 is about 233.4852566169.

The spelling of 12728534 in words is "twelve million, seven hundred twenty-eight thousand, five hundred thirty-four".