850440 has 64 divisors (see below), whose sum is σ = 2692800. Its totient is φ = 214272.

The previous prime is 850439. The next prime is 850453. The reversal of 850440 is 44058.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 850440.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2094 + ... + 2466.

It is an arithmetic number, because the mean of its divisors is an integer number (42075).

2⁸⁵⁰⁴⁴⁰ 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 850440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1346400).

850440 is an abundant number, since it is smaller than the sum of its proper divisors (1842360).

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

850440 is a wasteful number, since it uses less digits than its factorization.

850440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406 (or 402 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 850440 is about 922.1930383602. The cubic root of 850440 is about 94.7431659196.

Adding to 850440 its reverse (44058), we get a palindrome (894498).

The spelling of 850440 in words is "eight hundred fifty thousand, four hundred forty".