8406985 has 4 divisors (see below), whose sum is σ = 10088388. Its totient is φ = 6725584.

The previous prime is 8406977. The next prime is 8406991. The reversal of 8406985 is 5896048.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4549689 + 3857296 = 2133^2 + 1964^2 .

It is a cyclic number.

It is not a de Polignac number, because 8406985 - 2³ = 8406977 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 840694 + ... + 840703.

It is an arithmetic number, because the mean of its divisors is an integer number (2522097).

Almost surely, 2^8406985 is an apocalyptic number.

It is an amenable number.

8406985 is a deficient number, since it is larger than the sum of its proper divisors (1681403).

8406985 is a wasteful number, since it uses less digits than its factorization.

8406985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1681402.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 8406985 is about 2899.4801258157. The cubic root of 8406985 is about 203.3356012169.

The spelling of 8406985 in words is "eight million, four hundred six thousand, nine hundred eighty-five".