855820870 has 8 divisors (see below), whose sum is σ = 1540477584. Its totient is φ = 342328344.

The previous prime is 855820831. The next prime is 855820877. The reversal of 855820870 is 78028558.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855820877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42791034 + ... + 42791053.

It is an arithmetic number, because the mean of its divisors is an integer number (192559698).

Almost surely, 2^855820870 is an apocalyptic number.

855820870 is a deficient number, since it is larger than the sum of its proper divisors (684656714).

855820870 is a wasteful number, since it uses less digits than its factorization.

855820870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85582094.

The product of its (nonzero) digits is 179200, while the sum is 43.

The square root of 855820870 is about 29254.4162478078. The cubic root of 855820870 is about 949.4256435887.

The spelling of 855820870 in words is "eight hundred fifty-five million, eight hundred twenty thousand, eight hundred seventy".