855387500 has 72 divisors (see below), whose sum is σ = 2041463088. Its totient is φ = 311000000.

The previous prime is 855387493. The next prime is 855387517. The reversal of 855387500 is 5783558.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 134390 + ... + 140610.

It is an arithmetic number, because the mean of its divisors is an integer number (28353654).

Almost surely, 2^855387500 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 855387500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1020731544).

855387500 is an abundant number, since it is smaller than the sum of its proper divisors (1186075588).

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

855387500 is a wasteful number, since it uses less digits than its factorization.

855387500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6261 (or 6239 counting only the distinct ones).

The product of its (nonzero) digits is 168000, while the sum is 41.

The square root of 855387500 is about 29247.0083940221. The cubic root of 855387500 is about 949.2653600233.

The spelling of 855387500 in words is "eight hundred fifty-five million, three hundred eighty-seven thousand, five hundred".