12812728 has 8 divisors (see below), whose sum is σ = 24023880. Its totient is φ = 6406360.

The previous prime is 12812699. The next prime is 12812729. The reversal of 12812728 is 82721821.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 12812728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12812729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800788 + ... + 800803.

It is an arithmetic number, because the mean of its divisors is an integer number (3002985).

Almost surely, 2^12812728 is an apocalyptic number.

It is an amenable number.

12812728 is a deficient number, since it is larger than the sum of its proper divisors (11211152).

12812728 is a wasteful number, since it uses less digits than its factorization.

12812728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601597 (or 1601593 counting only the distinct ones).

The product of its digits is 3584, while the sum is 31.

The square root of 12812728 is about 3579.4871140989. The cubic root of 12812728 is about 233.9989285752.

It can be divided in two parts, 12 and 812728, that multiplied together give a triangular number (9752736 = T₄₄₁₆).

The spelling of 12812728 in words is "twelve million, eight hundred twelve thousand, seven hundred twenty-eight".