261936976 has 20 divisors (see below), whose sum is σ = 580003552. Its totient is φ = 112258656.

The previous prime is 261936959. The next prime is 261936991. The reversal of 261936976 is 679639162.

It is a super-2 number, since 2×261936976² = 137221958792049152, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1169250 + ... + 1169473.

Almost surely, 2^261936976 is an apocalyptic number.

It is an amenable number.

261936976 is an abundant number, since it is smaller than the sum of its proper divisors (318066576).

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

261936976 is a wasteful number, since it uses less digits than its factorization.

261936976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2338738 (or 2338732 counting only the distinct ones).

The product of its digits is 734832, while the sum is 49.

The square root of 261936976 is about 16184.4671212864. The cubic root of 261936976 is about 639.8314790675.

The spelling of 261936976 in words is "two hundred sixty-one million, nine hundred thirty-six thousand, nine hundred seventy-six".