8720006 has 4 divisors (see below), whose sum is σ = 13080012. Its totient is φ = 4360002.

The previous prime is 8719999. The next prime is 8720027. The reversal of 8720006 is 6000278.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2180000 + ... + 2180003.

It is an arithmetic number, because the mean of its divisors is an integer number (3270003).

Almost surely, 2^8720006 is an apocalyptic number.

8720006 is a deficient number, since it is larger than the sum of its proper divisors (4360006).

8720006 is a wasteful number, since it uses less digits than its factorization.

8720006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4360005.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 8720006 is about 2952.9656279747. The cubic root of 8720006 is about 205.8285405227.

The spelling of 8720006 in words is "eight million, seven hundred twenty thousand, six".