261860748 has 12 divisors (see below), whose sum is σ = 611008440. Its totient is φ = 87286912.

The previous prime is 261860743. The next prime is 261860759. The reversal of 261860748 is 847068162.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (261860743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10910853 + ... + 10910876.

It is an arithmetic number, because the mean of its divisors is an integer number (50917370).

Almost surely, 2^261860748 is an apocalyptic number.

It is an amenable number.

261860748 is an abundant number, since it is smaller than the sum of its proper divisors (349147692).

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

261860748 is a wasteful number, since it uses less digits than its factorization.

261860748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21821736 (or 21821734 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 261860748 is about 16182.1119758825. Note that the first 3 decimals coincide. The cubic root of 261860748 is about 639.7694058584.

The spelling of 261860748 in words is "two hundred sixty-one million, eight hundred sixty thousand, seven hundred forty-eight".