13000728 has 32 divisors (see below), whose sum is σ = 35002800. Its totient is φ = 4000128.

The previous prime is 13000723. The next prime is 13000751. The reversal of 13000728 is 82700031.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13000723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20523 + ... + 21146.

Almost surely, 2^13000728 is an apocalyptic number.

It is an amenable number.

13000728 is an abundant number, since it is smaller than the sum of its proper divisors (22002072).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13000728 is a wasteful number, since it uses less digits than its factorization.

13000728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41691 (or 41687 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 13000728 is about 3605.6522294864. The cubic root of 13000728 is about 235.1378578482.

Adding to 13000728 its reverse (82700031), we get a palindrome (95700759).

The spelling of 13000728 in words is "thirteen million, seven hundred twenty-eight", and thus it is an aban number.