261026880 has 56 divisors (see below), whose sum is σ = 828763392. Its totient is φ = 69606912.

The previous prime is 261026879. The next prime is 261026911. The reversal of 261026880 is 88620162.

261026880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134992 + ... + 136911.

Almost surely, 2^261026880 is an apocalyptic number.

261026880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261026880 is an abundant number, since it is smaller than the sum of its proper divisors (567736512).

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

261026880 is a wasteful number, since it uses less digits than its factorization.

261026880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271923 (or 271913 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 261026880 is about 16156.3263151002. The cubic root of 261026880 is about 639.0895909610.

The spelling of 261026880 in words is "two hundred sixty-one million, twenty-six thousand, eight hundred eighty".