261448260 has 24 divisors (see below), whose sum is σ = 732055296. Its totient is φ = 69719520.

The previous prime is 261448217. The next prime is 261448277. The reversal of 261448260 is 62844162.

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 7 ways as a sum of consecutive naturals, for example, 2178676 + ... + 2178795.

It is an arithmetic number, because the mean of its divisors is an integer number (30502304).

Almost surely, 2^261448260 is an apocalyptic number.

261448260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261448260 is an abundant number, since it is smaller than the sum of its proper divisors (470607036).

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

261448260 is a wasteful number, since it uses less digits than its factorization.

261448260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4357483 (or 4357481 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 261448260 is about 16169.3617684805. The cubic root of 261448260 is about 639.4333036981.

The spelling of 261448260 in words is "two hundred sixty-one million, four hundred forty-eight thousand, two hundred sixty".