857488668 has 48 divisors (see below), whose sum is σ = 2097070080. Its totient is φ = 272188224.

The previous prime is 857488661. The next prime is 857488739. The reversal of 857488668 is 866884758.

857488668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857488661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56421 + ... + 69987.

It is an arithmetic number, because the mean of its divisors is an integer number (43688960).

Almost surely, 2^857488668 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 857488668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1048535040).

857488668 is an abundant number, since it is smaller than the sum of its proper divisors (1239581412).

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

857488668 is a wasteful number, since it uses less digits than its factorization.

857488668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13826 (or 13824 counting only the distinct ones).

The product of its digits is 20643840, while the sum is 60.

The square root of 857488668 is about 29282.9074376162. The cubic root of 857488668 is about 950.0419807856.

The spelling of 857488668 in words is "eight hundred fifty-seven million, four hundred eighty-eight thousand, six hundred sixty-eight".