8121444 has 48 divisors (see below), whose sum is σ = 20575296. Its totient is φ = 2483200.

The previous prime is 8121439. The next prime is 8121499. The reversal of 8121444 is 4441218.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7879 + ... + 8849.

It is an arithmetic number, because the mean of its divisors is an integer number (428652).

Almost surely, 2^8121444 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 8121444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10287648).

8121444 is an abundant number, since it is smaller than the sum of its proper divisors (12453852).

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

8121444 is a wasteful number, since it uses less digits than its factorization.

8121444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1036 (or 1034 counting only the distinct ones).

The product of its digits is 1024, while the sum is 24.

The square root of 8121444 is about 2849.8147308202. The cubic root of 8121444 is about 201.0069550327.

The spelling of 8121444 in words is "eight million, one hundred twenty-one thousand, four hundred forty-four".