856427829 has 8 divisors (see below), whose sum is σ = 1143885120. Its totient is φ = 569961216.

The previous prime is 856427807. The next prime is 856427849. The reversal of 856427829 is 928724658.

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

It is not a de Polignac number, because 856427829 - 2¹⁵ = 856395061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856427849) 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 7 ways as a sum of consecutive naturals, for example, 245649 + ... + 249110.

It is an arithmetic number, because the mean of its divisors is an integer number (142985640).

Almost surely, 2^856427829 is an apocalyptic number.

It is an amenable number.

856427829 is a deficient number, since it is larger than the sum of its proper divisors (287457291).

856427829 is a wasteful number, since it uses less digits than its factorization.

856427829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495339.

The product of its digits is 1935360, while the sum is 51.

The square root of 856427829 is about 29264.7882104074. The cubic root of 856427829 is about 949.6500387794.

The spelling of 856427829 in words is "eight hundred fifty-six million, four hundred twenty-seven thousand, eight hundred twenty-nine".