7280005 has 4 divisors (see below), whose sum is σ = 8736012. Its totient is φ = 5824000.

The previous prime is 7279999. The next prime is 7280011. The reversal of 7280005 is 5000827.

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

It is an interprime number because it is at equal distance from previous prime (7279999) and next prime (7280011).

It can be written as a sum of positive squares in 2 ways, for example, as 3207681 + 4072324 = 1791^2 + 2018^2 .

It is not a de Polignac number, because 7280005 - 2³ = 7279997 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 3 ways as a sum of consecutive naturals, for example, 727996 + ... + 728005.

It is an arithmetic number, because the mean of its divisors is an integer number (2184003).

Almost surely, 2^7280005 is an apocalyptic number.

It is an amenable number.

7280005 is a deficient number, since it is larger than the sum of its proper divisors (1456007).

7280005 is a wasteful number, since it uses less digits than its factorization.

7280005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1456006.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 7280005 is about 2698.1484392079. The cubic root of 7280005 is about 193.8104660392.

The spelling of 7280005 in words is "seven million, two hundred eighty thousand, five".