861920832 has 56 divisors (see below), whose sum is σ = 2359152000. Its totient is φ = 277398016.

The previous prime is 861920797. The next prime is 861920833. The reversal of 861920832 is 238029168.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (861920833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71832 + ... + 82967.

Almost surely, 2^861920832 is an apocalyptic number.

It is an amenable number.

861920832 is an abundant number, since it is smaller than the sum of its proper divisors (1497231168).

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

861920832 is a wasteful number, since it uses less digits than its factorization.

861920832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154843 (or 154833 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 861920832 is about 29358.4882444584. The cubic root of 861920832 is about 951.6760190318.

The spelling of 861920832 in words is "eight hundred sixty-one million, nine hundred twenty thousand, eight hundred thirty-two".