260086640 has 40 divisors (see below), whose sum is σ = 659676528. Its totient is φ = 94576640.

The previous prime is 260086637. The next prime is 260086667. The reversal of 260086640 is 46680062.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 260086597 and 260086606.

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 7 ways as a sum of consecutive naturals, for example, 146897 + ... + 148656.

Almost surely, 2^260086640 is an apocalyptic number.

260086640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

260086640 is an abundant number, since it is smaller than the sum of its proper divisors (399589888).

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

260086640 is a wasteful number, since it uses less digits than its factorization.

260086640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295577 (or 295571 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 260086640 is about 16127.2018651718. The cubic root of 260086640 is about 638.3213169066.

The spelling of 260086640 in words is "two hundred sixty million, eighty-six thousand, six hundred forty".