850453812 has 72 divisors (see below), whose sum is σ = 2318705480. Its totient is φ = 261273600.

The previous prime is 850453787. The next prime is 850453817. The reversal of 850453812 is 218354058.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10265616 + 840188196 = 3204^2 + 28986^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (850453817) 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, 471312 + ... + 473112.

Almost surely, 2^850453812 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 850453812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1159352740).

850453812 is an abundant number, since it is smaller than the sum of its proper divisors (1468251668).

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

850453812 is a wasteful number, since it uses less digits than its factorization.

850453812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2833 (or 2828 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 850453812 is about 29162.5412472919. The cubic root of 850453812 is about 947.4367882494.

The spelling of 850453812 in words is "eight hundred fifty million, four hundred fifty-three thousand, eight hundred twelve".