261038872 has 16 divisors (see below), whose sum is σ = 515208600. Its totient is φ = 123649920.

The previous prime is 261038867. The next prime is 261038873. The reversal of 261038872 is 278830162.

261038872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261038873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 858529 + ... + 858832.

Almost surely, 2^261038872 is an apocalyptic number.

It is an amenable number.

261038872 is a deficient number, since it is larger than the sum of its proper divisors (254169728).

261038872 is a wasteful number, since it uses less digits than its factorization.

261038872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1717386 (or 1717382 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 261038872 is about 16156.6974348101. The cubic root of 261038872 is about 639.0993777501.

The spelling of 261038872 in words is "two hundred sixty-one million, thirty-eight thousand, eight hundred seventy-two".