260891280 has 400 divisors, whose sum is σ = 1033475520. Its totient is φ = 60466176.

The previous prime is 260891273. The next prime is 260891291. The reversal of 260891280 is 82198062.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1600479 + ... + 1600641.

Almost surely, 2^260891280 is an apocalyptic number.

260891280 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 260891280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (516737760).

260891280 is an abundant number, since it is smaller than the sum of its proper divisors (772584240).

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

260891280 is a wasteful number, since it uses less digits than its factorization.

260891280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 260891280 is about 16152.1292713995. The cubic root of 260891280 is about 638.9789056053.

The spelling of 260891280 in words is "two hundred sixty million, eight hundred ninety-one thousand, two hundred eighty".