8720746 has 4 divisors (see below), whose sum is σ = 13081122. Its totient is φ = 4360372.

The previous prime is 8720729. The next prime is 8720771. The reversal of 8720746 is 6470278.

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

It can be written as a sum of positive squares in only one way, i.e., 7901721 + 819025 = 2811^2 + 905^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2180185 + ... + 2180188.

Almost surely, 2^8720746 is an apocalyptic number.

8720746 is a deficient number, since it is larger than the sum of its proper divisors (4360376).

8720746 is a wasteful number, since it uses less digits than its factorization.

8720746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4360375.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 8720746 is about 2953.0909230838. The cubic root of 8720746 is about 205.8343627209.

The spelling of 8720746 in words is "eight million, seven hundred twenty thousand, seven hundred forty-six".