44403561 has 12 divisors (see below), whose sum is σ = 64380420. Its totient is φ = 29490720.

The previous prime is 44403529. The next prime is 44403587. The reversal of 44403561 is 16530444.

44403561 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 3686400 + 40717161 = 1920^2 + 6381^2 .

It is not a de Polignac number, because 44403561 - 2⁵ = 44403529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (44403511) 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, 6750 + ... + 11591.

It is an arithmetic number, because the mean of its divisors is an integer number (5365035).

Almost surely, 2^44403561 is an apocalyptic number.

It is an amenable number.

44403561 is a deficient number, since it is larger than the sum of its proper divisors (19976859).

44403561 is a wasteful number, since it uses less digits than its factorization.

44403561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18616 (or 18613 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 44403561 is about 6663.5997028633. The cubic root of 44403561 is about 354.1108768839.

It can be divided in two parts, 4440 and 3561, that added together give a triangular number (8001 = T₁₂₆).

The spelling of 44403561 in words is "forty-four million, four hundred three thousand, five hundred sixty-one".