850113540 has 144 divisors (see below), whose sum is σ = 2687958000. Its totient is φ = 217211904.

The previous prime is 850113521. The next prime is 850113547. The reversal of 850113540 is 45311058.

850113540 is a `hidden beast` number, since 8 + 5 + 0 + 113 + 540 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 2604996 + 847508544 = 1614^2 + 29112^2 .

It is not an unprimeable number, because it can be changed into a prime (850113547) 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 47 ways as a sum of consecutive naturals, for example, 777234 + ... + 778326.

It is an arithmetic number, because the mean of its divisors is an integer number (18666375).

Almost surely, 2^850113540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 850113540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1343979000).

850113540 is an abundant number, since it is smaller than the sum of its proper divisors (1837844460).

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

850113540 is a wasteful number, since it uses less digits than its factorization.

850113540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286 (or 1281 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 850113540 is about 29156.7066041417. The cubic root of 850113540 is about 947.3104128907.

Adding to 850113540 its reverse (45311058), we get a palindrome (895424598).

The spelling of 850113540 in words is "eight hundred fifty million, one hundred thirteen thousand, five hundred forty".