8004945 has 16 divisors (see below), whose sum is σ = 13793472. Its totient is φ = 3940800.

The previous prime is 8004917. The next prime is 8004949. The reversal of 8004945 is 5494008.

It is not a de Polignac number, because 8004945 - 2⁷ = 8004817 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (8004949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20331 + ... + 20720.

It is an arithmetic number, because the mean of its divisors is an integer number (862092).

Almost surely, 2^8004945 is an apocalyptic number.

It is an amenable number.

8004945 is a deficient number, since it is larger than the sum of its proper divisors (5788527).

8004945 is a wasteful number, since it uses less digits than its factorization.

8004945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41072.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 8004945 is about 2829.3011504610. The cubic root of 8004945 is about 200.0411998456.

The spelling of 8004945 in words is "eight million, four thousand, nine hundred forty-five".