8720735 has 16 divisors (see below), whose sum is σ = 10929600. Its totient is φ = 6671616.

The previous prime is 8720729. The next prime is 8720771. The reversal of 8720735 is 5370278.

It is a cyclic number.

It is not a de Polignac number, because 8720735 - 2⁶ = 8720671 is a prime.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 19646 + ... + 20084.

It is an arithmetic number, because the mean of its divisors is an integer number (683100).

Almost surely, 2^8720735 is an apocalyptic number.

8720735 is a deficient number, since it is larger than the sum of its proper divisors (2208865).

8720735 is a wasteful number, since it uses less digits than its factorization.

8720735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 8720735 is about 2953.0890606279. The cubic root of 8720735 is about 205.8342761772.

The spelling of 8720735 in words is "eight million, seven hundred twenty thousand, seven hundred thirty-five".