260780856 has 64 divisors (see below), whose sum is σ = 757332480. Its totient is φ = 73284480.

The previous prime is 260780813. The next prime is 260780857. The reversal of 260780856 is 658087062.

260780856 = T₆₃ + T₆₄ + ... + T₁₁₆₀.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260780857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2476 + ... + 22971.

It is an arithmetic number, because the mean of its divisors is an integer number (11833320).

Almost surely, 2^260780856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 260780856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (378666240).

260780856 is an abundant number, since it is smaller than the sum of its proper divisors (496551624).

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

260780856 is a wasteful number, since it uses less digits than its factorization.

260780856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25524 (or 25520 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 260780856 is about 16148.7106606069. The cubic root of 260780856 is about 638.8887421679. Note that the first 3 decimals are identical.

The spelling of 260780856 in words is "two hundred sixty million, seven hundred eighty thousand, eight hundred fifty-six".