12140728 has 8 divisors (see below), whose sum is σ = 22763880. Its totient is φ = 6070360.

The previous prime is 12140693. The next prime is 12140731. The reversal of 12140728 is 82704121.

It is a happy number.

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 polite number, since it can be written as a sum of consecutive naturals, namely, 758788 + ... + 758803.

It is an arithmetic number, because the mean of its divisors is an integer number (2845485).

Almost surely, 2^12140728 is an apocalyptic number.

It is an amenable number.

12140728 is a deficient number, since it is larger than the sum of its proper divisors (10623152).

12140728 is a wasteful number, since it uses less digits than its factorization.

12140728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1517597 (or 1517593 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 12140728 is about 3484.3547465779. The cubic root of 12140728 is about 229.8343356504.

Adding to 12140728 its reverse (82704121), we get a palindrome (94844849).

The spelling of 12140728 in words is "twelve million, one hundred forty thousand, seven hundred twenty-eight".