260561280 has 128 divisors (see below), whose sum is σ = 949236480. Its totient is φ = 59553792.

The previous prime is 260561251. The next prime is 260561291. The reversal of 260561280 is 82165062.

260561280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3747 + ... + 23133.

It is an arithmetic number, because the mean of its divisors is an integer number (7415910).

Almost surely, 2^260561280 is an apocalyptic number.

260561280 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 260561280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (474618240).

260561280 is an abundant number, since it is smaller than the sum of its proper divisors (688675200).

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

260561280 is a wasteful number, since it uses less digits than its factorization.

260561280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19416 (or 19404 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 260561280 is about 16141.9106675759. The cubic root of 260561280 is about 638.7093782529.

The spelling of 260561280 in words is "two hundred sixty million, five hundred sixty-one thousand, two hundred eighty".