8556990 has 64 divisors (see below), whose sum is σ = 22752576. Its totient is φ = 2045952.

The previous prime is 8556959. The next prime is 8557007. The reversal of 8556990 is 996558.

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 31 ways as a sum of consecutive naturals, for example, 14134 + ... + 14726.

It is an arithmetic number, because the mean of its divisors is an integer number (355509).

Almost surely, 2^8556990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8556990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11376288).

8556990 is an abundant number, since it is smaller than the sum of its proper divisors (14195586).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8556990 is a wasteful number, since it uses less digits than its factorization.

8556990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653.

The product of its (nonzero) digits is 97200, while the sum is 42.

The square root of 8556990 is about 2925.2333240273. The cubic root of 8556990 is about 204.5378444756.

It can be divided in two parts, 85 and 56990, that added together give a palindrome (57075).

The spelling of 8556990 in words is "eight million, five hundred fifty-six thousand, nine hundred ninety".