8449809 has 16 divisors (see below), whose sum is σ = 11848704. Its totient is φ = 5346000.

The previous prime is 8449807. The next prime is 8449829. The reversal of 8449809 is 9089448.

It is not a de Polignac number, because 8449809 - 2¹ = 8449807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8449807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10014 + ... + 10824.

It is an arithmetic number, because the mean of its divisors is an integer number (740544).

Almost surely, 2^8449809 is an apocalyptic number.

It is an amenable number.

8449809 is a deficient number, since it is larger than the sum of its proper divisors (3398895).

8449809 is a wasteful number, since it uses less digits than its factorization.

8449809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 8449809 is about 2906.8555175653. The cubic root of 8449809 is about 203.6802709693.

The spelling of 8449809 in words is "eight million, four hundred forty-nine thousand, eight hundred nine".