8320404 has 24 divisors (see below), whose sum is σ = 20436640. Its totient is φ = 2627424.

The previous prime is 8320393. The next prime is 8320409. The reversal of 8320404 is 4040238.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8320409) 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, 18019 + ... + 18474.

Almost surely, 2^8320404 is an apocalyptic number.

It is an amenable number.

8320404 is an abundant number, since it is smaller than the sum of its proper divisors (12116236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8320404 is a wasteful number, since it uses less digits than its factorization.

8320404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36519 (or 36517 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 8320404 is about 2884.5110504209. The cubic root of 8320404 is about 202.6351604898.

The spelling of 8320404 in words is "eight million, three hundred twenty thousand, four hundred four".