8990730 has 128 divisors (see below), whose sum is σ = 28200960. Its totient is φ = 1995840.

The previous prime is 8990719. The next prime is 8990731. The reversal of 8990730 is 370998.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8990731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 126595 + ... + 126665.

It is an arithmetic number, because the mean of its divisors is an integer number (220320).

Almost surely, 2^8990730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8990730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14100480).

8990730 is an abundant number, since it is smaller than the sum of its proper divisors (19210230).

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

8990730 is a wasteful number, since it uses less digits than its factorization.

8990730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161 (or 155 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 8990730 is about 2998.4546019575. The cubic root of 8990730 is about 207.9369415603.

The spelling of 8990730 in words is "eight million, nine hundred ninety thousand, seven hundred thirty".