44451220 has 48 divisors (see below), whose sum is σ = 102932928. Its totient is φ = 15989760.

The previous prime is 44451193. The next prime is 44451221. The reversal of 44451220 is 2215444.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 44451191 and 44451200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44451221) by changing a digit.

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, 20299 + ... + 22381.

It is an arithmetic number, because the mean of its divisors is an integer number (2144436).

Almost surely, 2^44451220 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 44451220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51466464).

44451220 is an abundant number, since it is smaller than the sum of its proper divisors (58481708).

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

44451220 is a wasteful number, since it uses less digits than its factorization.

44451220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2200 (or 2198 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 44451220 is about 6667.1748139673. The cubic root of 44451220 is about 354.2375224017.

Adding to 44451220 its reverse (2215444), we get a palindrome (46666664).

It can be divided in two parts, 4445 and 1220, that added together give a palindrome (5665).

The spelling of 44451220 in words is "forty-four million, four hundred fifty-one thousand, two hundred twenty".