8280005 has 8 divisors (see below), whose sum is σ = 9957624. Its totient is φ = 6609600.

The previous prime is 8279987. The next prime is 8280011. The reversal of 8280005 is 5000828.

It can be written as a sum of positive squares in 4 ways, for example, as 2292196 + 5987809 = 1514^2 + 2447^2 .

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

It is not a de Polignac number, because 8280005 - 2¹⁴ = 8263621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1175 + ... + 4235.

It is an arithmetic number, because the mean of its divisors is an integer number (1244703).

Almost surely, 2^8280005 is an apocalyptic number.

It is an amenable number.

8280005 is a deficient number, since it is larger than the sum of its proper divisors (1677619).

8280005 is a wasteful number, since it uses less digits than its factorization.

8280005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3607.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 8280005 is about 2877.4997827976. The cubic root of 8280005 is about 202.3066691118.

The spelling of 8280005 in words is "eight million, two hundred eighty thousand, five".