8249728 has 16 divisors (see below), whose sum is σ = 16435260. Its totient is φ = 4124800.

The previous prime is 8249723. The next prime is 8249783. The reversal of 8249728 is 8279428.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8249723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32098 + ... + 32353.

Almost surely, 2^8249728 is an apocalyptic number.

It is an amenable number.

8249728 is a deficient number, since it is larger than the sum of its proper divisors (8185532).

8249728 is an equidigital number, since it uses as much as digits as its factorization.

8249728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64465 (or 64453 counting only the distinct ones).

The product of its digits is 64512, while the sum is 40.

The square root of 8249728 is about 2872.2339737563. The cubic root of 8249728 is about 202.0597803657.

The spelling of 8249728 in words is "eight million, two hundred forty-nine thousand, seven hundred twenty-eight".