7985857 has 8 divisors (see below), whose sum is σ = 8924832. Its totient is φ = 7082400.

The previous prime is 7985851. The next prime is 7985893. The reversal of 7985857 is 7585897.

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

It is a cyclic number.

It is not a de Polignac number, because 7985857 - 2⁷ = 7985729 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7985857.

It is not an unprimeable number, because it can be changed into a prime (7985851) 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 7 ways as a sum of consecutive naturals, for example, 8403 + ... + 9304.

It is an arithmetic number, because the mean of its divisors is an integer number (1115604).

Almost surely, 2^7985857 is an apocalyptic number.

It is an amenable number.

7985857 is a deficient number, since it is larger than the sum of its proper divisors (938975).

7985857 is a wasteful number, since it uses less digits than its factorization.

7985857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17759.

The product of its digits is 705600, while the sum is 49.

The square root of 7985857 is about 2825.9258659774. The cubic root of 7985857 is about 199.8820721454.

The spelling of 7985857 in words is "seven million, nine hundred eighty-five thousand, eight hundred fifty-seven".