857872986 has 16 divisors (see below), whose sum is σ = 1716349824. Its totient is φ = 285857024.

The previous prime is 857872969. The next prime is 857872987. The reversal of 857872986 is 689278758.

It is not an unprimeable number, because it can be changed into a prime (857872987) 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, 5511 + ... + 41786.

It is an arithmetic number, because the mean of its divisors is an integer number (107271864).

Almost surely, 2^857872986 is an apocalyptic number.

857872986 is an abundant number, since it is smaller than the sum of its proper divisors (858476838).

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

857872986 is a wasteful number, since it uses less digits than its factorization.

857872986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50325.

The product of its digits is 13547520, while the sum is 60.

The square root of 857872986 is about 29289.4688582774. The cubic root of 857872986 is about 950.1838927485.

It can be divided in two parts, 857872 and 986, that added together give a palindrome (858858).

The spelling of 857872986 in words is "eight hundred fifty-seven million, eight hundred seventy-two thousand, nine hundred eighty-six".