261703870 has 16 divisors (see below), whose sum is σ = 477703008. Its totient is φ = 103206880.

The previous prime is 261703837. The next prime is 261703873. The reversal of 261703870 is 78307162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261703873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183589 + ... + 185008.

It is an arithmetic number, because the mean of its divisors is an integer number (29856438).

Almost surely, 2^261703870 is an apocalyptic number.

261703870 is a deficient number, since it is larger than the sum of its proper divisors (215999138).

261703870 is a wasteful number, since it uses less digits than its factorization.

261703870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368675.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 261703870 is about 16177.2639837520. The cubic root of 261703870 is about 639.6416206456.

The spelling of 261703870 in words is "two hundred sixty-one million, seven hundred three thousand, eight hundred seventy".