851830 has 32 divisors (see below), whose sum is σ = 1799424. Its totient is φ = 284256.

The previous prime is 851821. The next prime is 851831. The reversal of 851830 is 38158.

It is a super-2 number, since 2×851830² = 1451228697800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 851795 and 851804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2869 + ... + 3151.

It is an arithmetic number, because the mean of its divisors is an integer number (56232).

2⁸⁵¹⁸³⁰ is an apocalyptic number.

851830 is an abundant number, since it is smaller than the sum of its proper divisors (947594).

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

851830 is a wasteful number, since it uses less digits than its factorization.

851830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 851830 is about 922.9463689728. The cubic root of 851830 is about 94.7947554173.

Adding to 851830 its reverse (38158), we get a palindrome (889988).

It can be divided in two parts, 851 and 830, that added together give a square (1681 = 41²).

The spelling of 851830 in words is "eight hundred fifty-one thousand, eight hundred thirty".