261089276 has 12 divisors (see below), whose sum is σ = 522178608. Its totient is φ = 111895392.

The previous prime is 261089239. The next prime is 261089287. The reversal of 261089276 is 672980162.

261089276 is an admirable number.

It is a super-2 number, since 2×261089276² = 136335220084408352, which contains 22 as substring.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a zygodrome in base 2.

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, 4662281 + ... + 4662336.

It is an arithmetic number, because the mean of its divisors is an integer number (43514884).

Almost surely, 2^261089276 is an apocalyptic number.

It is an amenable number.

261089276 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

261089276 is a wasteful number, since it uses less digits than its factorization.

261089276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9324628 (or 9324626 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 261089276 is about 16158.2572080036. The cubic root of 261089276 is about 639.1405096725.

The spelling of 261089276 in words is "two hundred sixty-one million, eighty-nine thousand, two hundred seventy-six".