8405004 has 24 divisors (see below), whose sum is σ = 20765808. Its totient is φ = 2636800.

The previous prime is 8405003. The next prime is 8405029. The reversal of 8405004 is 4005048.

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (8405003) 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, 20397 + ... + 20804.

It is an arithmetic number, because the mean of its divisors is an integer number (865242).

Almost surely, 2^8405004 is an apocalyptic number.

It is an amenable number.

8405004 is an abundant number, since it is smaller than the sum of its proper divisors (12360804).

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

8405004 is a wasteful number, since it uses less digits than its factorization.

8405004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41225 (or 41223 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 8405004 is about 2899.1384927250. The cubic root of 8405004 is about 203.3196288055.

The spelling of 8405004 in words is "eight million, four hundred five thousand, four".