845422320 has 80 divisors (see below), whose sum is σ = 2637009792. Its totient is φ = 224052480.

The previous prime is 845422243. The next prime is 845422321. The reversal of 845422320 is 23224548.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (845422321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28315 + ... + 49925.

Almost surely, 2^845422320 is an apocalyptic number.

845422320 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 845422320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1318504896).

845422320 is an abundant number, since it is smaller than the sum of its proper divisors (1791587472).

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

845422320 is a wasteful number, since it uses less digits than its factorization.

845422320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21790 (or 21784 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

The square root of 845422320 is about 29076.1469249280. The cubic root of 845422320 is about 945.5646691029.

Adding to 845422320 its reverse (23224548), we get a palindrome (868646868).

The spelling of 845422320 in words is "eight hundred forty-five million, four hundred twenty-two thousand, three hundred twenty".