44406209 has 4 divisors (see below), whose sum is σ = 45244116. Its totient is φ = 43568304.

The previous prime is 44406203. The next prime is 44406269. The reversal of 44406209 is 90260444.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13359025 + 31047184 = 3655^2 + 5572^2 .

It is a cyclic number.

It is not a de Polignac number, because 44406209 - 2⁸ = 44405953 is a prime.

It is a super-2 number, since 2×44406209² = 3943822795503362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (44406203) 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, 418874 + ... + 418979.

It is an arithmetic number, because the mean of its divisors is an integer number (11311029).

Almost surely, 2^44406209 is an apocalyptic number.

It is an amenable number.

44406209 is a deficient number, since it is larger than the sum of its proper divisors (837907).

44406209 is an equidigital number, since it uses as much as digits as its factorization.

44406209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837906.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 44406209 is about 6663.7983913081. The cubic root of 44406209 is about 354.1179158611.

The spelling of 44406209 in words is "forty-four million, four hundred six thousand, two hundred nine".