260605890 has 128 divisors (see below), whose sum is σ = 729388800. Its totient is φ = 66124800.

The previous prime is 260605831. The next prime is 260605897. The reversal of 260605890 is 98506062.

It is not an unprimeable number, because it can be changed into a prime (260605897) 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 63 ways as a sum of consecutive naturals, for example, 649690 + ... + 650090.

It is an arithmetic number, because the mean of its divisors is an integer number (5698350).

Almost surely, 2^260605890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 260605890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (364694400).

260605890 is an abundant number, since it is smaller than the sum of its proper divisors (468782910).

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

260605890 is a wasteful number, since it uses less digits than its factorization.

260605890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529 (or 523 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 260605890 is about 16143.2924151178. The cubic root of 260605890 is about 638.7458267478.

The spelling of 260605890 in words is "two hundred sixty million, six hundred five thousand, eight hundred ninety".