44681220 has 60 divisors (see below), whose sum is σ = 140171724. Its totient is φ = 11914560.

The previous prime is 44681213. The next prime is 44681227. The reversal of 44681220 is 2218644.

It is an interprime number because it is at equal distance from previous prime (44681213) and next prime (44681227).

It can be written as a sum of positive squares in 2 ways, for example, as 34644996 + 10036224 = 5886^2 + 3168^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-2 number, since 2×44681220² = 3992822841376800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (44681227) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12171 + ... + 15410.

Almost surely, 2^44681220 is an apocalyptic number.

It is an amenable number.

44681220 is an abundant number, since it is smaller than the sum of its proper divisors (95490504).

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

44681220 is a wasteful number, since it uses less digits than its factorization.

44681220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27602 (or 27591 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 44681220 is about 6684.4012446890. The cubic root of 44681220 is about 354.8474382479.

Adding to 44681220 its reverse (2218644), we get a palindrome (46899864).

The spelling of 44681220 in words is "forty-four million, six hundred eighty-one thousand, two hundred twenty".