44975781 has 12 divisors (see below), whose sum is σ = 67205580. Its totient is φ = 28949760.

The previous prime is 44975779. The next prime is 44975789. The reversal of 44975781 is 18757944.

It is a happy number.

44975781 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 2 ways, for example, as 28451556 + 16524225 = 5334^2 + 4065^2 .

It is not a de Polignac number, because 44975781 - 2¹ = 44975779 is a prime.

It is a super-2 number, since 2×44975781² = 4045641753119922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44975789) 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 11 ways as a sum of consecutive naturals, for example, 85900 + ... + 86421.

It is an arithmetic number, because the mean of its divisors is an integer number (5600465).

Almost surely, 2^44975781 is an apocalyptic number.

It is an amenable number.

44975781 is a deficient number, since it is larger than the sum of its proper divisors (22229799).

44975781 is a wasteful number, since it uses less digits than its factorization.

44975781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172356 (or 172353 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 44975781 is about 6706.3985118691. The cubic root of 44975781 is about 355.6255083321.

The spelling of 44975781 in words is "forty-four million, nine hundred seventy-five thousand, seven hundred eighty-one".