861266532 has 72 divisors (see below), whose sum is σ = 2367442560. Its totient is φ = 242948160.

The previous prime is 861266513. The next prime is 861266543. The reversal of 861266532 is 235662168.

861266532 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37182 + ... + 55722.

Almost surely, 2^861266532 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 861266532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1183721280).

861266532 is an abundant number, since it is smaller than the sum of its proper divisors (1506176028).

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

861266532 is a wasteful number, since it uses less digits than its factorization.

861266532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18641 (or 18632 counting only the distinct ones).

The product of its digits is 103680, while the sum is 39.

The square root of 861266532 is about 29347.3428439442. The cubic root of 861266532 is about 951.4351464653.

The spelling of 861266532 in words is "eight hundred sixty-one million, two hundred sixty-six thousand, five hundred thirty-two".