44985809 has 4 divisors (see below), whose sum is σ = 49075440. Its totient is φ = 40896180.

The previous prime is 44985803. The next prime is 44985841. The reversal of 44985809 is 90858944.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44985809 is a prime.

It is a super-2 number, since 2×44985809² = 4047446022768962, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (44985803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2044799 + ... + 2044820.

It is an arithmetic number, because the mean of its divisors is an integer number (12268860).

Almost surely, 2^44985809 is an apocalyptic number.

It is an amenable number.

44985809 is a deficient number, since it is larger than the sum of its proper divisors (4089631).

44985809 is a wasteful number, since it uses less digits than its factorization.

44985809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4089630.

The product of its (nonzero) digits is 414720, while the sum is 47.

The square root of 44985809 is about 6707.1461144066. The cubic root of 44985809 is about 355.6519369825.

The spelling of 44985809 in words is "forty-four million, nine hundred eighty-five thousand, eight hundred nine".