260405860 has 96 divisors (see below), whose sum is σ = 650788992. Its totient is φ = 86277120.

The previous prime is 260405857. The next prime is 260405863. The reversal of 260405860 is 68504062.

It is an interprime number because it is at equal distance from previous prime (260405857) and next prime (260405863).

It is a super-2 number, since 2×260405860² = 135622423844679200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (260405863) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 236832 + ... + 237928.

It is an arithmetic number, because the mean of its divisors is an integer number (6779052).

Almost surely, 2^260405860 is an apocalyptic number.

260405860 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 260405860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (325394496).

260405860 is an abundant number, since it is smaller than the sum of its proper divisors (390383132).

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

260405860 is a wasteful number, since it uses less digits than its factorization.

260405860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1213 (or 1211 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 260405860 is about 16137.0957734036. The cubic root of 260405860 is about 638.5823602051.

The spelling of 260405860 in words is "two hundred sixty million, four hundred five thousand, eight hundred sixty".