44681409 has 16 divisors (see below), whose sum is σ = 66306240. Its totient is φ = 29737440.

The previous prime is 44681393. The next prime is 44681419. The reversal of 44681409 is 90418644.

It is a happy number.

It is not a de Polignac number, because 44681409 - 2⁴ = 44681393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (44681419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22174 + ... + 24104.

It is an arithmetic number, because the mean of its divisors is an integer number (4144140).

Almost surely, 2^44681409 is an apocalyptic number.

It is an amenable number.

44681409 is a deficient number, since it is larger than the sum of its proper divisors (21624831).

44681409 is a wasteful number, since it uses less digits than its factorization.

44681409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2797 (or 2791 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 44681409 is about 6684.4153820660. The cubic root of 44681409 is about 354.8479385780.

The spelling of 44681409 in words is "forty-four million, six hundred eighty-one thousand, four hundred nine".