8949990 has 128 divisors (see below), whose sum is σ = 27371520. Its totient is φ = 1824768.

The previous prime is 8949961. The next prime is 8949991. The reversal of 8949990 is 999498.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8949991) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 82056 + ... + 82164.

It is an arithmetic number, because the mean of its divisors is an integer number (213840).

Almost surely, 2^8949990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8949990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13685760).

8949990 is an abundant number, since it is smaller than the sum of its proper divisors (18421530).

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

8949990 is a wasteful number, since it uses less digits than its factorization.

8949990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166.

The product of its (nonzero) digits is 209952, while the sum is 48.

The square root of 8949990 is about 2991.6533890142. The cubic root of 8949990 is about 207.6223887259.

The spelling of 8949990 in words is "eight million, nine hundred forty-nine thousand, nine hundred ninety".