856670432 has 24 divisors (see below), whose sum is σ = 1692547416. Its totient is φ = 426817152.

The previous prime is 856670417. The next prime is 856670491. The reversal of 856670432 is 234076658.

It is a happy number.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 856670432.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 38243 + ... + 56354.

It is an arithmetic number, because the mean of its divisors is an integer number (70522809).

Almost surely, 2^856670432 is an apocalyptic number.

It is an amenable number.

856670432 is a deficient number, since it is larger than the sum of its proper divisors (835876984).

856670432 is a wasteful number, since it uses less digits than its factorization.

856670432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94890 (or 94882 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 41.

The square root of 856670432 is about 29268.9328811284. The cubic root of 856670432 is about 949.7397004297.

The spelling of 856670432 in words is "eight hundred fifty-six million, six hundred seventy thousand, four hundred thirty-two".