861197832 has 384 divisors, whose sum is σ = 2943682560. Its totient is φ = 232657920.

The previous prime is 861197803. The next prime is 861197839. The reversal of 861197832 is 238791168.

It is not an unprimeable number, because it can be changed into a prime (861197839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8361093 + ... + 8361195.

It is an arithmetic number, because the mean of its divisors is an integer number (7665840).

Almost surely, 2^861197832 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 861197832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1471841280).

861197832 is an abundant number, since it is smaller than the sum of its proper divisors (2082484728).

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

861197832 is a wasteful number, since it uses less digits than its factorization.

861197832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175 (or 159 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 861197832 is about 29346.1723568850. The cubic root of 861197832 is about 951.4098483219.

The spelling of 861197832 in words is "eight hundred sixty-one million, one hundred ninety-seven thousand, eight hundred thirty-two".