261319088 has 20 divisors (see below), whose sum is σ = 522639168. Its totient is φ = 126444480.

The previous prime is 261319033. The next prime is 261319099. The reversal of 261319088 is 880913162.

261319088 is an admirable 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, 262931 + ... + 263922.

Almost surely, 2^261319088 is an apocalyptic number.

It is an amenable number.

261319088 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.

261319088 is a wasteful number, since it uses less digits than its factorization.

261319088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526892 (or 526886 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 261319088 is about 16165.3669305710. The cubic root of 261319088 is about 639.3279794998.

The spelling of 261319088 in words is "two hundred sixty-one million, three hundred nineteen thousand, eighty-eight".