851898 has 16 divisors (see below), whose sum is σ = 1745856. Its totient is φ = 276960.

The previous prime is 851891. The next prime is 851899. The reversal of 851898 is 898158.

It is not an unprimeable number, because it can be changed into a prime (851891) by changing a digit.

851898 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1486 + ... + 1977.

It is an arithmetic number, because the mean of its divisors is an integer number (109116).

2⁸⁵¹⁸⁹⁸ is an apocalyptic number.

851898 is an abundant number, since it is smaller than the sum of its proper divisors (893958).

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

851898 is a wasteful number, since it uses less digits than its factorization.

851898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3509.

The product of its digits is 23040, while the sum is 39.

The square root of 851898 is about 922.9832067811. The cubic root of 851898 is about 94.7972777797.

The spelling of 851898 in words is "eight hundred fifty-one thousand, eight hundred ninety-eight".