260621220 has 48 divisors (see below), whose sum is σ = 772668288. Its totient is φ = 65410560.

The previous prime is 260621183. The next prime is 260621227. The reversal of 260621220 is 22126062.

It is not an unprimeable number, because it can be changed into a prime (260621227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126736 + ... + 128775.

It is an arithmetic number, because the mean of its divisors is an integer number (16097256).

Almost surely, 2^260621220 is an apocalyptic number.

260621220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

260621220 is an abundant number, since it is smaller than the sum of its proper divisors (512047068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

260621220 is a wasteful number, since it uses less digits than its factorization.

260621220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255540 (or 255538 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 260621220 is about 16143.7672183416. The cubic root of 260621220 is about 638.7583511277.

Adding to 260621220 its reverse (22126062), we get a palindrome (282747282).

The spelling of 260621220 in words is "two hundred sixty million, six hundred twenty-one thousand, two hundred twenty".