8728229 has 4 divisors (see below), whose sum is σ = 8913984. Its totient is φ = 8542476.

The previous prime is 8728211. The next prime is 8728241. The reversal of 8728229 is 9228278.

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 an emirpimes, since its reverse is a distinct semiprime: 9228278 = 2 ⋅4614139.

It is a cyclic number.

It is not a de Polignac number, because 8728229 - 2²⁰ = 7679653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8728192 and 8728201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8728289) 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 in 3 ways as a sum of consecutive naturals, for example, 92807 + ... + 92900.

It is an arithmetic number, because the mean of its divisors is an integer number (2228496).

Almost surely, 2^8728229 is an apocalyptic number.

It is an amenable number.

8728229 is a deficient number, since it is larger than the sum of its proper divisors (185755).

8728229 is a wasteful number, since it uses less digits than its factorization.

8728229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185754.

The product of its digits is 32256, while the sum is 38.

The square root of 8728229 is about 2954.3576289948. The cubic root of 8728229 is about 205.8932192376.

The spelling of 8728229 in words is "eight million, seven hundred twenty-eight thousand, two hundred twenty-nine".