8989890 has 128 divisors (see below), whose sum is σ = 27578880. Its totient is φ = 1824768.

The previous prime is 8989873. The next prime is 8989919. The reversal of 8989890 is 989898.

It is an Ulam number.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 100966 + ... + 101054.

It is an arithmetic number, because the mean of its divisors is an integer number (215460).

Almost surely, 2^8989890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8989890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13789440).

8989890 is an abundant number, since it is smaller than the sum of its proper divisors (18588990).

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

8989890 is a wasteful number, since it uses less digits than its factorization.

8989890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156.

The product of its (nonzero) digits is 373248, while the sum is 51.

The square root of 8989890 is about 2998.3145265299. The cubic root of 8989890 is about 207.9304655393.

The spelling of 8989890 in words is "eight million, nine hundred eighty-nine thousand, eight hundred ninety".