8639090 has 8 divisors (see below), whose sum is σ = 15550380. Its totient is φ = 3455632.

The previous prime is 8639089. The next prime is 8639107. The reversal of 8639090 is 909368.

It can be written as a sum of positive squares in 2 ways, for example, as 8637721 + 1369 = 2939^2 + 37^2 .

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8639090.

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 3 ways as a sum of consecutive naturals, for example, 431945 + ... + 431964.

Almost surely, 2^8639090 is an apocalyptic number.

8639090 is a deficient number, since it is larger than the sum of its proper divisors (6911290).

8639090 is a wasteful number, since it uses less digits than its factorization.

8639090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863916.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 8639090 is about 2939.2328931202. The cubic root of 8639090 is about 205.1899092829.

The spelling of 8639090 in words is "eight million, six hundred thirty-nine thousand, ninety".