8720506 has 8 divisors (see below), whose sum is σ = 13769280. Its totient is φ = 4130748.

The previous prime is 8720497. The next prime is 8720513. The reversal of 8720506 is 6050278.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114706 + ... + 114781.

It is an arithmetic number, because the mean of its divisors is an integer number (1721160).

Almost surely, 2^8720506 is an apocalyptic number.

8720506 is a deficient number, since it is larger than the sum of its proper divisors (5048774).

8720506 is a wasteful number, since it uses less digits than its factorization.

8720506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229508.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 8720506 is about 2953.0502874147. The cubic root of 8720506 is about 205.8324744765.

The spelling of 8720506 in words is "eight million, seven hundred twenty thousand, five hundred six".