856191232 has 144 divisors (see below), whose sum is σ = 1954129408. Its totient is φ = 371589120.

The previous prime is 856191229. The next prime is 856191239. The reversal of 856191232 is 232191658.

It is a junction number, because it is equal to n+sod(n) for n = 856191191 and 856191200.

It is not an unprimeable number, because it can be changed into a prime (856191239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4436128 + ... + 4436320.

Almost surely, 2^856191232 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 856191232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (977064704).

856191232 is an abundant number, since it is smaller than the sum of its proper divisors (1097938176).

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

856191232 is a wasteful number, since it uses less digits than its factorization.

856191232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296 (or 282 counting only the distinct ones).

The product of its digits is 25920, while the sum is 37.

The square root of 856191232 is about 29260.7455817517. The cubic root of 856191232 is about 949.5625805269.

The spelling of 856191232 in words is "eight hundred fifty-six million, one hundred ninety-one thousand, two hundred thirty-two".