8420444280 has 96 divisors (see below), whose sum is σ = 27423208800. Its totient is φ = 2240794368.

The previous prime is 8420444273. The next prime is 8420444281. The reversal of 8420444280 is 824440248.

8420444280 is a `hidden beast` number, since 8 + 4 + 204 + 442 + 8 + 0 = 666.

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 (8420444281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 151306 + ... + 199334.

It is an arithmetic number, because the mean of its divisors is an integer number (285658425).

Almost surely, 2^8420444280 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 8420444280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13711604400).

8420444280 is an abundant number, since it is smaller than the sum of its proper divisors (19002764520).

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

8420444280 is a wasteful number, since it uses less digits than its factorization.

8420444280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48533 (or 48526 counting only the distinct ones).

The product of its (nonzero) digits is 65536, while the sum is 36.

The square root of 8420444280 is about 91762.9788095395. The cubic root of 8420444280 is about 2034.4405435076.

The spelling of 8420444280 in words is "eight billion, four hundred twenty million, four hundred forty-four thousand, two hundred eighty".