8018409 has 12 divisors (see below), whose sum is σ = 12436944. Its totient is φ = 4581864.

The previous prime is 8018383. The next prime is 8018419. The reversal of 8018409 is 9048108.

It is a happy number.

It is not a de Polignac number, because 8018409 - 2⁷ = 8018281 is a prime.

8018409 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8018419) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27127 + ... + 27420.

It is an arithmetic number, because the mean of its divisors is an integer number (1036412).

Almost surely, 2^8018409 is an apocalyptic number.

It is an amenable number.

8018409 is a deficient number, since it is larger than the sum of its proper divisors (4418535).

8018409 is a wasteful number, since it uses less digits than its factorization.

8018409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54564 (or 54557 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 8018409 is about 2831.6795369533. The cubic root of 8018409 is about 200.1532908129.

The spelling of 8018409 in words is "eight million, eighteen thousand, four hundred nine".