851888 has 20 divisors (see below), whose sum is σ = 1696320. Its totient is φ = 414144.

The previous prime is 851881. The next prime is 851891. The reversal of 851888 is 888158.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (851881) by changing a digit.

851888 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 3 ways as a sum of consecutive naturals, for example, 128 + ... + 1311.

It is an arithmetic number, because the mean of its divisors is an integer number (84816).

2⁸⁵¹⁸⁸⁸ is an apocalyptic number.

It is an amenable number.

851888 is a deficient number, since it is larger than the sum of its proper divisors (844432).

851888 is a wasteful number, since it uses less digits than its factorization.

851888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1484 (or 1478 counting only the distinct ones).

The product of its digits is 20480, while the sum is 38.

The square root of 851888 is about 922.9777895486. The cubic root of 851888 is about 94.7969068525.

The spelling of 851888 in words is "eight hundred fifty-one thousand, eight hundred eighty-eight".