44640222 has 64 divisors (see below), whose sum is σ = 102332160. Its totient is φ = 12857600.

The previous prime is 44640203. The next prime is 44640223. The reversal of 44640222 is 22204644.

It is a junction number, because it is equal to n+sod(n) for n = 44640192 and 44640201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44640223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 158722 + ... + 159002.

It is an arithmetic number, because the mean of its divisors is an integer number (1598940).

Almost surely, 2^44640222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 44640222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51166080).

44640222 is an abundant number, since it is smaller than the sum of its proper divisors (57691938).

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

44640222 is a wasteful number, since it uses less digits than its factorization.

44640222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409.

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 44640222 is about 6681.3338488658. Note that the first 3 decimals coincide. The cubic root of 44640222 is about 354.7388729705.

Adding to 44640222 its reverse (22204644), we get a palindrome (66844866).

The spelling of 44640222 in words is "forty-four million, six hundred forty thousand, two hundred twenty-two".