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9989910 = 23257101157
BaseRepresentation
bin100110000110…
…111100010110
3200210112120200
4212012330112
510024134120
6554041330
7150625050
oct46067426
920715520
109989910
115703627
123419246
1320ba0b8
1414808d0
15d24e90
hex986f16

9989910 has 96 divisors (see below), whose sum is σ = 30169152. Its totient is φ = 2246400.

The previous prime is 9989899. The next prime is 9989921. The reversal of 9989910 is 199899.

It can be divided in two parts, 99 and 89910, that added together give a palindrome (90009).

9989910 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (9989899) and next prime (9989921).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 63552 + ... + 63708.

It is an arithmetic number, because the mean of its divisors is an integer number (314262).

Almost surely, 29989910 is an apocalyptic number.

9989910 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 9989910, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15084576).

9989910 is an abundant number, since it is smaller than the sum of its proper divisors (20179242).

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

9989910 is a wasteful number, since it uses less digits than its factorization.

9989910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278 (or 275 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 45.

The square root of 9989910 is about 3160.6818884538. The cubic root of 9989910 is about 215.3709837985.

The spelling of 9989910 in words is "nine million, nine hundred eighty-nine thousand, nine hundred ten".