8280705 has 8 divisors (see below), whose sum is σ = 13249152. Its totient is φ = 4416368.

The previous prime is 8280703. The next prime is 8280707. The reversal of 8280705 is 5070828.

It is an interprime number because it is at equal distance from previous prime (8280703) and next prime (8280707).

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

It is a cyclic number.

It is not a de Polignac number, because 8280705 - 2¹ = 8280703 is a prime.

It is an Ulam number.

It is a Curzon number.

8280705 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8280703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 276009 + ... + 276038.

It is an arithmetic number, because the mean of its divisors is an integer number (1656144).

Almost surely, 2^8280705 is an apocalyptic number.

It is an amenable number.

8280705 is a deficient number, since it is larger than the sum of its proper divisors (4968447).

8280705 is a wasteful number, since it uses less digits than its factorization.

8280705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552055.

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 8280705 is about 2877.6214135984. The cubic root of 8280705 is about 202.3123700213.

The spelling of 8280705 in words is "eight million, two hundred eighty thousand, seven hundred five".