851299844 has 12 divisors (see below), whose sum is σ = 1499264844. Its totient is φ = 422938464.

The previous prime is 851299831. The next prime is 851299847. The reversal of 851299844 is 448992158.

851299844 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 609497344 + 241802500 = 24688^2 + 15550^2 .

It is a super-2 number, since 2×851299844² = 1449422848788848672, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 851299792 and 851299801.

It is not an unprimeable number, because it can be changed into a prime (851299847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 677159 + ... + 678414.

It is an arithmetic number, because the mean of its divisors is an integer number (124938737).

Almost surely, 2^851299844 is an apocalyptic number.

It is an amenable number.

851299844 is a deficient number, since it is larger than the sum of its proper divisors (647965000).

851299844 is a wasteful number, since it uses less digits than its factorization.

851299844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355734 (or 1355732 counting only the distinct ones).

The product of its digits is 829440, while the sum is 50.

The square root of 851299844 is about 29177.0430989845. The cubic root of 851299844 is about 947.7508543704.

The spelling of 851299844 in words is "eight hundred fifty-one million, two hundred ninety-nine thousand, eight hundred forty-four".