856880641 has 8 divisors (see below), whose sum is σ = 903343104. Its totient is φ = 811594560.

The previous prime is 856880599. The next prime is 856880653. The reversal of 856880641 is 146088658.

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

It is a cyclic number.

It is not a de Polignac number, because 856880641 - 2⁷ = 856880513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 856880591 and 856880600.

It is not an unprimeable number, because it can be changed into a prime (856880741) 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, 292600 + ... + 295513.

It is an arithmetic number, because the mean of its divisors is an integer number (112917888).

Almost surely, 2^856880641 is an apocalyptic number.

It is an amenable number.

856880641 is a deficient number, since it is larger than the sum of its proper divisors (46462463).

856880641 is a wasteful number, since it uses less digits than its factorization.

856880641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588191.

The product of its (nonzero) digits is 368640, while the sum is 46.

The square root of 856880641 is about 29272.5236527362. The cubic root of 856880641 is about 949.8173761604.

The spelling of 856880641 in words is "eight hundred fifty-six million, eight hundred eighty thousand, six hundred forty-one".