261120444 has 24 divisors (see below), whose sum is σ = 656149200. Its totient is φ = 80344704.

The previous prime is 261120427. The next prime is 261120521. The reversal of 261120444 is 444021162.

It is a happy number.

261120444 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 an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 836769 + ... + 837080.

It is an arithmetic number, because the mean of its divisors is an integer number (27339550).

Almost surely, 2^261120444 is an apocalyptic number.

It is an amenable number.

261120444 is an abundant number, since it is smaller than the sum of its proper divisors (395028756).

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

261120444 is a wasteful number, since it uses less digits than its factorization.

261120444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1673869 (or 1673867 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 261120444 is about 16159.2216396706. The cubic root of 261120444 is about 639.1659415083.

The spelling of 261120444 in words is "two hundred sixty-one million, one hundred twenty thousand, four hundred forty-four".