857547680 has 96 divisors (see below), whose sum is σ = 2219374080. Its totient is φ = 310533120.

The previous prime is 857547619. The next prime is 857547683. The reversal of 857547680 is 86745758.

It is not an unprimeable number, because it can be changed into a prime (857547683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 486641 + ... + 488399.

It is an arithmetic number, because the mean of its divisors is an integer number (23118480).

Almost surely, 2^857547680 is an apocalyptic number.

857547680 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 857547680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1109687040).

857547680 is an abundant number, since it is smaller than the sum of its proper divisors (1361826400).

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

857547680 is a wasteful number, since it uses less digits than its factorization.

857547680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2062 (or 2054 counting only the distinct ones).

The product of its (nonzero) digits is 1881600, while the sum is 50.

The square root of 857547680 is about 29283.9150388059. The cubic root of 857547680 is about 950.0637741121.

The spelling of 857547680 in words is "eight hundred fifty-seven million, five hundred forty-seven thousand, six hundred eighty".