8490865 has 12 divisors (see below), whose sum is σ = 10439604. Its totient is φ = 6627296.

The previous prime is 8490829. The next prime is 8490877. The reversal of 8490865 is 5680948.

It can be written as a sum of positive squares in 2 ways, for example, as 4613904 + 3876961 = 2148^2 + 1969^2 .

It is a de Polignac number, because none of the positive numbers 2^k-8490865 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 47346 + ... + 47524.

It is an arithmetic number, because the mean of its divisors is an integer number (869967).

Almost surely, 2^8490865 is an apocalyptic number.

It is an amenable number.

8490865 is a deficient number, since it is larger than the sum of its proper divisors (1948739).

8490865 is an equidigital number, since it uses as much as digits as its factorization.

8490865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416 (or 237 counting only the distinct ones).

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

The square root of 8490865 is about 2913.9088867018. The cubic root of 8490865 is about 204.0096192440.

The spelling of 8490865 in words is "eight million, four hundred ninety thousand, eight hundred sixty-five".