850040 has 32 divisors (see below), whose sum is σ = 1944000. Its totient is φ = 334464.

The previous prime is 850033. The next prime is 850043. The reversal of 850040 is 40058.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (850043) by changing a digit.

850040 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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3026 + ... + 3294.

It is an arithmetic number, because the mean of its divisors is an integer number (60750).

2⁸⁵⁰⁰⁴⁰ 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 850040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (972000).

850040 is an abundant number, since it is smaller than the sum of its proper divisors (1093960).

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

850040 is a wasteful number, since it uses less digits than its factorization.

850040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359 (or 355 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 850040 is about 921.9761385199. The cubic root of 850040 is about 94.7283096062.

Adding to 850040 its reverse (40058), we get a palindrome (890098).

The spelling of 850040 in words is "eight hundred fifty thousand, forty".