8728728 has 32 divisors (see below), whose sum is σ = 21903360. Its totient is φ = 2898720.

The previous prime is 8728721. The next prime is 8728757. The reversal of 8728728 is 8278278.

It is a self number, because there is not a number n which added to its sum of digits gives 8728728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8728721) 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, 8313 + ... + 9303.

It is an arithmetic number, because the mean of its divisors is an integer number (684480).

Almost surely, 2^8728728 is an apocalyptic number.

It is an amenable number.

8728728 is an abundant number, since it is smaller than the sum of its proper divisors (13174632).

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

8728728 is a wasteful number, since it uses less digits than its factorization.

8728728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1367 (or 1363 counting only the distinct ones).

The product of its digits is 100352, while the sum is 42.

The square root of 8728728 is about 2954.4420793104. The cubic root of 8728728 is about 205.8971428575.

The spelling of 8728728 in words is "eight million, seven hundred twenty-eight thousand, seven hundred twenty-eight".