44220640 has 48 divisors (see below), whose sum is σ = 104923728. Its totient is φ = 17611776.

The previous prime is 44220637. The next prime is 44220643. The reversal of 44220640 is 4602244.

It is an interprime number because it is at equal distance from previous prime (44220637) and next prime (44220643).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44220643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49639 + ... + 50521.

It is an arithmetic number, because the mean of its divisors is an integer number (2185911).

Almost surely, 2^44220640 is an apocalyptic number.

44220640 is a gapful number since it is divisible by the number (40) 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 44220640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52461864).

44220640 is an abundant number, since it is smaller than the sum of its proper divisors (60703088).

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

44220640 is a wasteful number, since it uses less digits than its factorization.

44220640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1211 (or 1203 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 44220640 is about 6649.8601489054. The cubic root of 44220640 is about 353.6239529784.

Adding to 44220640 its reverse (4602244), we get a palindrome (48822884).

The spelling of 44220640 in words is "forty-four million, two hundred twenty thousand, six hundred forty".