261061392 has 20 divisors (see below), whose sum is σ = 674408720. Its totient is φ = 87020448.

The previous prime is 261061379. The next prime is 261061397. The reversal of 261061392 is 293160162.

It is not an unprimeable number, because it can be changed into a prime (261061397) 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, 2719342 + ... + 2719437.

It is an arithmetic number, because the mean of its divisors is an integer number (33720436).

Almost surely, 2^261061392 is an apocalyptic number.

It is an amenable number.

261061392 is an abundant number, since it is smaller than the sum of its proper divisors (413347328).

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

261061392 is a wasteful number, since it uses less digits than its factorization.

261061392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5438790 (or 5438784 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 261061392 is about 16157.3943443861. The cubic root of 261061392 is about 639.1177557334.

The spelling of 261061392 in words is "two hundred sixty-one million, sixty-one thousand, three hundred ninety-two".