261707968 has 28 divisors (see below), whose sum is σ = 524481552. Its totient is φ = 129555200.

The previous prime is 261707959. The next prime is 261707981. The reversal of 261707968 is 869707162.

It is a happy 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 3 ways as a sum of consecutive naturals, for example, 13780 + ... + 26707.

It is an arithmetic number, because the mean of its divisors is an integer number (18731484).

Almost surely, 2^261707968 is an apocalyptic number.

It is an amenable number.

261707968 is an abundant number, since it is smaller than the sum of its proper divisors (262773584).

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

261707968 is a wasteful number, since it uses less digits than its factorization.

261707968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40600 (or 40590 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 261707968 is about 16177.3906424986. The cubic root of 261707968 is about 639.6449593272.

The spelling of 261707968 in words is "two hundred sixty-one million, seven hundred seven thousand, nine hundred sixty-eight".