856427830 has 8 divisors (see below), whose sum is σ = 1541570112. Its totient is φ = 342571128.

The previous prime is 856427807. The next prime is 856427849. The reversal of 856427830 is 38724658.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 42821382 + ... + 42821401.

It is an arithmetic number, because the mean of its divisors is an integer number (192696264).

Almost surely, 2^856427830 is an apocalyptic number.

856427830 is a deficient number, since it is larger than the sum of its proper divisors (685142282).

856427830 is a wasteful number, since it uses less digits than its factorization.

856427830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85642790.

The product of its (nonzero) digits is 322560, while the sum is 43.

The square root of 856427830 is about 29264.7882274928. The cubic root of 856427830 is about 949.6500391490.

The spelling of 856427830 in words is "eight hundred fifty-six million, four hundred twenty-seven thousand, eight hundred thirty".