12500728 has 8 divisors (see below), whose sum is σ = 23438880. Its totient is φ = 6250360.

The previous prime is 12500693. The next prime is 12500749. The reversal of 12500728 is 82700521.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 781288 + ... + 781303.

It is an arithmetic number, because the mean of its divisors is an integer number (2929860).

Almost surely, 2^12500728 is an apocalyptic number.

It is an amenable number.

12500728 is a deficient number, since it is larger than the sum of its proper divisors (10938152).

12500728 is a wasteful number, since it uses less digits than its factorization.

12500728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1562597 (or 1562593 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 12500728 is about 3535.6368591811. The cubic root of 12500728 is about 232.0839470287.

The spelling of 12500728 in words is "twelve million, five hundred thousand, seven hundred twenty-eight".