8404985 has 8 divisors (see below), whose sum is σ = 10106376. Its totient is φ = 6710400.

The previous prime is 8404969. The next prime is 8404993. The reversal of 8404985 is 5894048.

It can be written as a sum of positive squares in 4 ways, for example, as 2948089 + 5456896 = 1717^2 + 2336^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8404985 - 2⁴ = 8404969 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1607 + ... + 4403.

It is an arithmetic number, because the mean of its divisors is an integer number (1263297).

Almost surely, 2^8404985 is an apocalyptic number.

It is an amenable number.

8404985 is a deficient number, since it is larger than the sum of its proper divisors (1701391).

8404985 is a wasteful number, since it uses less digits than its factorization.

8404985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3403.

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 8404985 is about 2899.1352158877. The cubic root of 8404985 is about 203.3194756001.

The spelling of 8404985 in words is "eight million, four hundred four thousand, nine hundred eighty-five".