8728249 has 4 divisors (see below), whose sum is σ = 8736336. Its totient is φ = 8720164.

The previous prime is 8728241. The next prime is 8728261. The reversal of 8728249 is 9428278.

8728249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 8728249 - 2³ = 8728241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8728241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2119 + ... + 4684.

It is an arithmetic number, because the mean of its divisors is an integer number (2184084).

Almost surely, 2^8728249 is an apocalyptic number.

It is an amenable number.

8728249 is a deficient number, since it is larger than the sum of its proper divisors (8087).

8728249 is a wasteful number, since it uses less digits than its factorization.

8728249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8086.

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

The square root of 8728249 is about 2954.3610138235. The cubic root of 8728249 is about 205.8933764998.

The spelling of 8728249 in words is "eight million, seven hundred twenty-eight thousand, two hundred forty-nine".