261876672 has 56 divisors (see below), whose sum is σ = 769874000. Its totient is φ = 87291648.

The previous prime is 261876647. The next prime is 261876673. The reversal of 261876672 is 276678162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261876673) 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 7 ways as a sum of consecutive naturals, for example, 74047 + ... + 77502.

It is an arithmetic number, because the mean of its divisors is an integer number (13747750).

Almost surely, 2^261876672 is an apocalyptic number.

It is an amenable number.

261876672 is an abundant number, since it is smaller than the sum of its proper divisors (507997328).

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

261876672 is a wasteful number, since it uses less digits than its factorization.

261876672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151570 (or 151554 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 261876672 is about 16182.6039931774. The cubic root of 261876672 is about 639.7823739233.

The spelling of 261876672 in words is "two hundred sixty-one million, eight hundred seventy-six thousand, six hundred seventy-two".