8409404 has 12 divisors (see below), whose sum is σ = 14994504. Its totient is φ = 4125264.

The previous prime is 8409403. The next prime is 8409409. The reversal of 8409404 is 4049048.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8409403) 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, 19622 + ... + 20045.

It is an arithmetic number, because the mean of its divisors is an integer number (1249542).

Almost surely, 2^8409404 is an apocalyptic number.

It is an amenable number.

8409404 is a deficient number, since it is larger than the sum of its proper divisors (6585100).

8409404 is a wasteful number, since it uses less digits than its factorization.

8409404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39724 (or 39722 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 8409404 is about 2899.8972395587. The cubic root of 8409404 is about 203.3551017335.

The spelling of 8409404 in words is "eight million, four hundred nine thousand, four hundred four".