855487920 has 160 divisors (see below), whose sum is σ = 3190510080. Its totient is φ = 185241600.

The previous prime is 855487879. The next prime is 855487931. The reversal of 855487920 is 29784558.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 855487920.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18520 + ... + 45320.

It is an arithmetic number, because the mean of its divisors is an integer number (19940688).

Almost surely, 2^855487920 is an apocalyptic number.

855487920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 855487920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1595255040).

855487920 is an abundant number, since it is smaller than the sum of its proper divisors (2335022160).

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

855487920 is a wasteful number, since it uses less digits than its factorization.

855487920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26843 (or 26837 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 48.

The square root of 855487920 is about 29248.7251004210. The cubic root of 855487920 is about 949.3025055655.

The spelling of 855487920 in words is "eight hundred fifty-five million, four hundred eighty-seven thousand, nine hundred twenty".