2600028505 has 4 divisors (see below), whose sum is σ = 3120034212. Its totient is φ = 2080022800.

The previous prime is 2600028481. The next prime is 2600028527. The reversal of 2600028505 is 5058200062.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1432849609 + 1167178896 = 37853^2 + 34164^2 .

It is not a de Polignac number, because 2600028505 - 2⁹ = 2600027993 is a prime.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 260002846 + ... + 260002855.

It is an arithmetic number, because the mean of its divisors is an integer number (780008553).

Almost surely, 2^2600028505 is an apocalyptic number.

It is an amenable number.

2600028505 is a deficient number, since it is larger than the sum of its proper divisors (520005707).

2600028505 is an equidigital number, since it uses as much as digits as its factorization.

2600028505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520005706.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 2600028505 is about 50990.4746496833. The cubic root of 2600028505 is about 1375.0738922273.

Adding to 2600028505 its reverse (5058200062), we get a palindrome (7658228567).

The spelling of 2600028505 in words is "two billion, six hundred million, twenty-eight thousand, five hundred five".