843485820 has 96 divisors (see below), whose sum is σ = 2445864960. Its totient is φ = 216967680.

The previous prime is 843485779. The next prime is 843485833. The reversal of 843485820 is 28584348.

It is a happy number.

It is a super-2 number, since 2×843485820² = 1422936657082144800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 816024 + ... + 817056.

It is an arithmetic number, because the mean of its divisors is an integer number (25477760).

Almost surely, 2^843485820 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 843485820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1222932480).

843485820 is an abundant number, since it is smaller than the sum of its proper divisors (1602379140).

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

843485820 is a wasteful number, since it uses less digits than its factorization.

843485820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1515 (or 1513 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 42.

The square root of 843485820 is about 29042.8273417035. The cubic root of 843485820 is about 944.8421561064.

The spelling of 843485820 in words is "eight hundred forty-three million, four hundred eighty-five thousand, eight hundred twenty".