261364308 has 24 divisors (see below), whose sum is σ = 610115520. Its totient is φ = 87083520.

The previous prime is 261364283. The next prime is 261364331. The reversal of 261364308 is 803463162.

It is a super-3 number, since 3×261364308³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

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, 44148 + ... + 49716.

It is an arithmetic number, because the mean of its divisors is an integer number (25421480).

Almost surely, 2^261364308 is an apocalyptic number.

It is an amenable number.

261364308 is an abundant number, since it is smaller than the sum of its proper divisors (348751212).

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

261364308 is a wasteful number, since it uses less digits than its factorization.

261364308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9487 (or 9485 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 261364308 is about 16166.7655392166. The cubic root of 261364308 is about 639.3648549075.

The spelling of 261364308 in words is "two hundred sixty-one million, three hundred sixty-four thousand, three hundred eight".