8881728 has 56 divisors (see below), whose sum is σ = 23725632. Its totient is φ = 2932224.

The previous prime is 8881711. The next prime is 8881751. The reversal of 8881728 is 8271888.

It is a happy number.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 8881728.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31926 + ... + 32202.

It is an arithmetic number, because the mean of its divisors is an integer number (423672).

Almost surely, 2^8881728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8881728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11862816).

8881728 is an abundant number, since it is smaller than the sum of its proper divisors (14843904).

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

8881728 is a wasteful number, since it uses less digits than its factorization.

8881728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459 (or 449 counting only the distinct ones).

The product of its digits is 57344, while the sum is 42.

The square root of 8881728 is about 2980.2228104623. Note that the first 3 decimals coincide. The cubic root of 8881728 is about 207.0931924192.

The spelling of 8881728 in words is "eight million, eight hundred eighty-one thousand, seven hundred twenty-eight".