8440009 has 8 divisors (see below), whose sum is σ = 9036000. Its totient is φ = 7859232.

The previous prime is 8439989. The next prime is 8440031. The reversal of 8440009 is 9000448.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8440009 - 2¹³ = 8431817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8441009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2644 + ... + 4885.

It is an arithmetic number, because the mean of its divisors is an integer number (1129500).

Almost surely, 2^8440009 is an apocalyptic number.

It is an amenable number.

8440009 is a deficient number, since it is larger than the sum of its proper divisors (595991).

8440009 is a wasteful number, since it uses less digits than its factorization.

8440009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7607.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 8440009 is about 2905.1693582303. The cubic root of 8440009 is about 203.6014984264.

The spelling of 8440009 in words is "eight million, four hundred forty thousand, nine".