260021580 has 96 divisors (see below), whose sum is σ = 896093184. Its totient is φ = 54860544.

The previous prime is 260021563. The next prime is 260021581. The reversal of 260021580 is 85120062.

It is a super-2 number, since 2×260021580² = 135222444131392800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 260021580.

It is not an unprimeable number, because it can be changed into a prime (260021581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18352 + ... + 29271.

It is an arithmetic number, because the mean of its divisors is an integer number (9334304).

Almost surely, 2^260021580 is an apocalyptic number.

260021580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

260021580 is an abundant number, since it is smaller than the sum of its proper divisors (636071604).

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

260021580 is a wasteful number, since it uses less digits than its factorization.

260021580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47655 (or 47653 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 260021580 is about 16125.1846501056. The cubic root of 260021580 is about 638.2680876594.

The spelling of 260021580 in words is "two hundred sixty million, twenty-one thousand, five hundred eighty".