44855581 has 8 divisors (see below), whose sum is σ = 46409400. Its totient is φ = 43319808.

The previous prime is 44855567. The next prime is 44855611. The reversal of 44855581 is 18555844.

It is a happy number.

44855581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3767481 + 41088100 = 1941^2 + 6410^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 44855581 - 2⁷ = 44855453 is a prime.

It is a super-2 number, since 2×44855581² = 4024046293695122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44855501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 645 + ... + 9493.

It is an arithmetic number, because the mean of its divisors is an integer number (5801175).

Almost surely, 2^44855581 is an apocalyptic number.

It is an amenable number.

44855581 is a deficient number, since it is larger than the sum of its proper divisors (1553819).

44855581 is a wasteful number, since it uses less digits than its factorization.

44855581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9023.

The product of its digits is 128000, while the sum is 40.

The square root of 44855581 is about 6697.4309253624. The cubic root of 44855581 is about 355.3084167610.

It can be divided in two parts, 44 and 855581, that added together give a square (855625 = 925²).

The spelling of 44855581 in words is "forty-four million, eight hundred fifty-five thousand, five hundred eighty-one".