857999994 has 16 divisors (see below), whose sum is σ = 1718055360. Its totient is φ = 285657440.

The previous prime is 857999977. The next prime is 857999999. The reversal of 857999994 is 499999758.

It is not an unprimeable number, because it can be changed into a prime (857999999) 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, 80187 + ... + 90254.

It is an arithmetic number, because the mean of its divisors is an integer number (107378460).

Almost surely, 2^857999994 is an apocalyptic number.

857999994 is an abundant number, since it is smaller than the sum of its proper divisors (860055366).

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

857999994 is a wasteful number, since it uses less digits than its factorization.

857999994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171285.

The product of its digits is 66134880, while the sum is 69.

The square root of 857999994 is about 29291.6369293353. The cubic root of 857999994 is about 950.2307819744.

The spelling of 857999994 in words is "eight hundred fifty-seven million, nine hundred ninety-nine thousand, nine hundred ninety-four".