857308081 has 8 divisors (see below), whose sum is σ = 994404800. Its totient is φ = 723867408.

The previous prime is 857308033. The next prime is 857308103. The reversal of 857308081 is 180803758.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-857308081 is a prime.

It is a super-2 number, since 2×857308081² = 1469954291495805122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (857308021) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 913506 + ... + 914443.

It is an arithmetic number, because the mean of its divisors is an integer number (124300600).

Almost surely, 2^857308081 is an apocalyptic number.

It is an amenable number.

857308081 is a deficient number, since it is larger than the sum of its proper divisors (137096719).

857308081 is a wasteful number, since it uses less digits than its factorization.

857308081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1828023.

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 857308081 is about 29279.8237870381. The cubic root of 857308081 is about 949.9752831981.

The spelling of 857308081 in words is "eight hundred fifty-seven million, three hundred eight thousand, eighty-one".