261822852 has 36 divisors (see below), whose sum is σ = 662363520. Its totient is φ = 87203952.

The previous prime is 261822839. The next prime is 261822881. The reversal of 261822852 is 258228162.

261822852 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62149 + ... + 66227.

Almost surely, 2^261822852 is an apocalyptic number.

It is an amenable number.

261822852 is an abundant number, since it is smaller than the sum of its proper divisors (400540668).

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

261822852 is a wasteful number, since it uses less digits than its factorization.

261822852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5872 (or 5867 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 261822852 is about 16180.9410109548. The cubic root of 261822852 is about 639.7385422904.

The spelling of 261822852 in words is "two hundred sixty-one million, eight hundred twenty-two thousand, eight hundred fifty-two".