855208020 has 48 divisors (see below), whose sum is σ = 2398253760. Its totient is φ = 227705856.

The previous prime is 855207937. The next prime is 855208061. The reversal of 855208020 is 20802558.

855208020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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, 29791 + ... + 50969.

It is an arithmetic number, because the mean of its divisors is an integer number (49963620).

Almost surely, 2^855208020 is an apocalyptic number.

It is an amenable number.

855208020 is an abundant number, since it is smaller than the sum of its proper divisors (1543045740).

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

855208020 is a wasteful number, since it uses less digits than its factorization.

855208020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21864 (or 21862 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 30.

The square root of 855208020 is about 29243.9398850428. The cubic root of 855208020 is about 949.1989628001.

The spelling of 855208020 in words is "eight hundred fifty-five million, two hundred eight thousand, twenty".