260509860 has 144 divisors (see below), whose sum is σ = 857473344. Its totient is φ = 63638784.

The previous prime is 260509841. The next prime is 260509877. The reversal of 260509860 is 68905062.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 381079 + ... + 381761.

It is an arithmetic number, because the mean of its divisors is an integer number (5954676).

Almost surely, 2^260509860 is an apocalyptic number.

260509860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 260509860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (428736672).

260509860 is an abundant number, since it is smaller than the sum of its proper divisors (596963484).

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

260509860 is a wasteful number, since it uses less digits than its factorization.

260509860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874 (or 869 counting only the distinct ones).

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

The square root of 260509860 is about 16140.3178407366. The cubic root of 260509860 is about 638.6673605020.

The spelling of 260509860 in words is "two hundred sixty million, five hundred nine thousand, eight hundred sixty".