855271720 has 64 divisors (see below), whose sum is σ = 1976166720. Its totient is φ = 332957184.

The previous prime is 855271709. The next prime is 855271783. The reversal of 855271720 is 27172558.

855271720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 855271720.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 596124 + ... + 597556.

It is an arithmetic number, because the mean of its divisors is an integer number (30877605).

Almost surely, 2^855271720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 855271720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (988083360).

855271720 is an abundant number, since it is smaller than the sum of its proper divisors (1120895000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

855271720 is a wasteful number, since it uses less digits than its factorization.

855271720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1834 (or 1830 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 37.

The square root of 855271720 is about 29245.0289792983. The cubic root of 855271720 is about 949.2225291806. Note that the first 3 decimals are identical.

The spelling of 855271720 in words is "eight hundred fifty-five million, two hundred seventy-one thousand, seven hundred twenty".