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8990 = 252931
BaseRepresentation
bin10001100011110
3110022222
42030132
5241430
6105342
735132
oct21436
913288
108990
116833
125252
134127
1433c2
1529e5
hex231e

8990 has 16 divisors (see below), whose sum is σ = 17280. Its totient is φ = 3360.

The previous prime is 8971. The next prime is 8999. The reversal of 8990 is 998.

It is a happy number.

8990 is digitally balanced in base 2 and base 6, because in such bases it contains all the possibile digits an equal number of times.

8990 is an undulating number in base 12.

8990 is strictly pandigital in base 6.

It is a Curzon number.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8999) by changing a digit.

8990 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 7 ways as a sum of consecutive naturals, for example, 275 + ... + 305.

It is an arithmetic number, because the mean of its divisors is an integer number (1080).

28990 is an apocalyptic number.

8990 is a deficient number, since it is larger than the sum of its proper divisors (8290).

8990 is a wasteful number, since it uses less digits than its factorization.

8990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 8990 is about 94.8156105291. The cubic root of 8990 is about 20.7931313613.

The spelling of 8990 in words is "eight thousand, nine hundred ninety".