2806720465 has 8 divisors (see below), whose sum is σ = 3405908520. Its totient is φ = 2220147072.

The previous prime is 2806720459. The next prime is 2806720487. The reversal of 2806720465 is 5640276082.

It can be written as a sum of positive squares in 4 ways, for example, as 717864849 + 2088855616 = 26793^2 + 45704^2 .

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 2806720465 - 2¹⁷ = 2806589393 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3153174 + ... + 3154063.

It is an arithmetic number, because the mean of its divisors is an integer number (425738565).

Almost surely, 2^2806720465 is an apocalyptic number.

It is an amenable number.

2806720465 is a deficient number, since it is larger than the sum of its proper divisors (599188055).

2806720465 is an equidigital number, since it uses as much as digits as its factorization.

2806720465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6307331.

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 2806720465 is about 52978.4905881623. The cubic root of 2806720465 is about 1410.5864912558.

The spelling of 2806720465 in words is "two billion, eight hundred six million, seven hundred twenty thousand, four hundred sixty-five".