260020305 has 12 divisors (see below), whose sum is σ = 450701940. Its totient is φ = 138677472.

The previous prime is 260020303. The next prime is 260020361. The reversal of 260020305 is 503020062.

It can be written as a sum of positive squares in 2 ways, for example, as 102090816 + 157929489 = 10104^2 + 12567^2 .

It is not a de Polignac number, because 260020305 - 2¹ = 260020303 is a prime.

It is a super-2 number, since 2×260020305² = 135221118024586050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (260020303) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2889070 + ... + 2889159.

It is an arithmetic number, because the mean of its divisors is an integer number (37558495).

Almost surely, 2^260020305 is an apocalyptic number.

It is an amenable number.

260020305 is a deficient number, since it is larger than the sum of its proper divisors (190681635).

260020305 is a wasteful number, since it uses less digits than its factorization.

260020305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5778240 (or 5778237 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 260020305 is about 16125.1451156261. The cubic root of 260020305 is about 638.2670444214.

Adding to 260020305 its reverse (503020062), we get a palindrome (763040367).

The spelling of 260020305 in words is "two hundred sixty million, twenty thousand, three hundred five".