44220420 has 72 divisors (see below), whose sum is σ = 137015424. Its totient is φ = 11539008.

The previous prime is 44220409. The next prime is 44220437. The reversal of 44220420 is 2402244.

44220420 is a `hidden beast` number, since 442 + 204 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 44220393 and 44220402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5847 + ... + 11073.

It is an arithmetic number, because the mean of its divisors is an integer number (1902992).

Almost surely, 2^44220420 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 44220420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68507712).

44220420 is an abundant number, since it is smaller than the sum of its proper divisors (92795004).

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

44220420 is a wasteful number, since it uses less digits than its factorization.

44220420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5289 (or 5284 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 44220420 is about 6649.8436071836. The cubic root of 44220420 is about 353.6233665448.

Adding to 44220420 its reverse (2402244), we get a palindrome (46622664).

The spelling of 44220420 in words is "forty-four million, two hundred twenty thousand, four hundred twenty".