850905012 has 72 divisors (see below), whose sum is σ = 2129401120. Its totient is φ = 264384000.

The previous prime is 850905007. The next prime is 850905017. The reversal of 850905012 is 210509058.

It is an interprime number because it is at equal distance from previous prime (850905007) and next prime (850905017).

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (850905017) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 376887 + ... + 379137.

Almost surely, 2^850905012 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 850905012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1064700560).

850905012 is an abundant number, since it is smaller than the sum of its proper divisors (1278496108).

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

850905012 is a wasteful number, since it uses less digits than its factorization.

850905012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2401 (or 2382 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 30.

The square root of 850905012 is about 29170.2761728442. The cubic root of 850905012 is about 947.6043097522.

The spelling of 850905012 in words is "eight hundred fifty million, nine hundred five thousand, twelve".