261343882 has 8 divisors (see below), whose sum is σ = 405533700. Its totient is φ = 126165984.

The previous prime is 261343877. The next prime is 261343883. The reversal of 261343882 is 288343162.

It can be written as a sum of positive squares in 2 ways, for example, as 243016921 + 18326961 = 15589^2 + 4281^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (261343883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2252907 + ... + 2253022.

Almost surely, 2^261343882 is an apocalyptic number.

261343882 is a deficient number, since it is larger than the sum of its proper divisors (144189818).

261343882 is a wasteful number, since it uses less digits than its factorization.

261343882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4505960.

The product of its digits is 55296, while the sum is 37.

The square root of 261343882 is about 16166.1337987782. The cubic root of 261343882 is about 639.3481987099.

The spelling of 261343882 in words is "two hundred sixty-one million, three hundred forty-three thousand, eight hundred eighty-two".