45440109 has 40 divisors (see below), whose sum is σ = 79767072. Its totient is φ = 25414560.

The previous prime is 45440047. The next prime is 45440119. The reversal of 45440109 is 90104454.

It is not a de Polignac number, because 45440109 - 2⁷ = 45439981 is a prime.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45440119) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 9622 + ... + 13544.

Almost surely, 2^45440109 is an apocalyptic number.

It is an amenable number.

45440109 is a deficient number, since it is larger than the sum of its proper divisors (34326963).

45440109 is a wasteful number, since it uses less digits than its factorization.

45440109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3959 (or 3950 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 45440109 is about 6740.9279034863. The cubic root of 45440109 is about 356.8451415073.

The spelling of 45440109 in words is "forty-five million, four hundred forty thousand, one hundred nine".