12702728 has 8 divisors (see below), whose sum is σ = 23817630. Its totient is φ = 6351360.

The previous prime is 12702721. The next prime is 12702763. The reversal of 12702728 is 82720721.

It can be written as a sum of positive squares in only one way, i.e., 12687844 + 14884 = 3562^2 + 122^2 .

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

It is a super-2 number, since 2×12702728² = 322718597283968, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12702728.

It is not an unprimeable number, because it can be changed into a prime (12702721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 793913 + ... + 793928.

Almost surely, 2^12702728 is an apocalyptic number.

It is an amenable number.

12702728 is a deficient number, since it is larger than the sum of its proper divisors (11114902).

12702728 is a wasteful number, since it uses less digits than its factorization.

12702728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1587847 (or 1587843 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 12702728 is about 3564.0886633191. The cubic root of 12702728 is about 233.3273594842.

The spelling of 12702728 in words is "twelve million, seven hundred two thousand, seven hundred twenty-eight".