44221780 has 48 divisors (see below), whose sum is σ = 95961600. Its totient is φ = 17107200.

The previous prime is 44221729. The next prime is 44221799. The reversal of 44221780 is 8712244.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163045 + ... + 163315.

It is an arithmetic number, because the mean of its divisors is an integer number (1999200).

Almost surely, 2^44221780 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 44221780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47980800).

44221780 is an abundant number, since it is smaller than the sum of its proper divisors (51739820).

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

44221780 is a wasteful number, since it uses less digits than its factorization.

44221780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520 (or 518 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 44221780 is about 6649.9458644413. The cubic root of 44221780 is about 353.6269917392.

It can be divided in two parts, 442 and 21780, that added together give a palindrome (22222).

The spelling of 44221780 in words is "forty-four million, two hundred twenty-one thousand, seven hundred eighty".