45609444 has 18 divisors (see below), whose sum is σ = 115290630. Its totient is φ = 15203136.

The previous prime is 45609439. The next prime is 45609449. The reversal of 45609444 is 44490654.

45609444 is a `hidden beast` number, since 4 + 5 + 609 + 4 + 44 = 666.

It is an interprime number because it is at equal distance from previous prime (45609439) and next prime (45609449).

It can be written as a sum of positive squares in only one way, i.e., 41447844 + 4161600 = 6438^2 + 2040^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1266929 = 45609444 / (4 + 5 + 6 + 0 + 9 + 4 + 4 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 45609399 and 45609408.

It is not an unprimeable number, because it can be changed into a prime (45609449) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 633429 + ... + 633500.

It is an arithmetic number, because the mean of its divisors is an integer number (6405035).

Almost surely, 2^45609444 is an apocalyptic number.

It is an amenable number.

45609444 is an abundant number, since it is smaller than the sum of its proper divisors (69681186).

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

45609444 is a wasteful number, since it uses less digits than its factorization.

45609444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266939 (or 1266934 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 45609444 is about 6753.4764381021. The cubic root of 45609444 is about 357.2878595353.

The spelling of 45609444 in words is "forty-five million, six hundred nine thousand, four hundred forty-four".