8990440 has 32 divisors (see below), whose sum is σ = 20702880. Its totient is φ = 3511872.

The previous prime is 8990431. The next prime is 8990441. The reversal of 8990440 is 440998.

It is a super-2 number, since 2×8990440² = 161656022787200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 8990396 and 8990405.

It is not an unprimeable number, because it can be changed into a prime (8990441) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 894 + ... + 4333.

It is an arithmetic number, because the mean of its divisors is an integer number (646965).

Almost surely, 2^8990440 is an apocalyptic number.

It is an amenable number.

8990440 is an abundant number, since it is smaller than the sum of its proper divisors (11712440).

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

8990440 is a wasteful number, since it uses less digits than its factorization.

8990440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5281 (or 5277 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 8990440 is about 2998.4062433233. The cubic root of 8990440 is about 207.9347058367.

The spelling of 8990440 in words is "eight million, nine hundred ninety thousand, four hundred forty".