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9999996840 = 2332527777769
BaseRepresentation
bin10010101000000101…
…11101011110101000
3221210220202110210100
421110002331132220
5130434444344330
64332142345400
7502544366511
oct112402753650
927726673710
109999996840
1142718126a9
121b30b8b260
13c349b8bc2
146ac161a08
153d7dac060
hex2540bd7a8

9999996840 has 48 divisors (see below), whose sum is σ = 32499990900. Its totient is φ = 2666665728.

The previous prime is 9999996823. The next prime is 9999996841. The reversal of 9999996840 is 486999999.

It can be written as a sum of positive squares in 2 ways, for example, as 9201030084 + 798966756 = 95922^2 + 28266^2 .

It is a Harshad number since it is a multiple of its sum of digits (72).

It is not an unprimeable number, because it can be changed into a prime (9999996841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13888525 + ... + 13889244.

Almost surely, 29999996840 is an apocalyptic number.

9999996840 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

9999996840 is an abundant number, since it is smaller than the sum of its proper divisors (22499994060).

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

9999996840 is a wasteful number, since it uses less digits than its factorization.

9999996840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27777786 (or 27777779 counting only the distinct ones).

The product of its (nonzero) digits is 102036672, while the sum is 72.

The square root of 9999996840 is about 99999.9841999988. The cubic root of 9999996840 is about 2154.4344630981.

The spelling of 9999996840 in words is "nine billion, nine hundred ninety-nine million, nine hundred ninety-six thousand, eight hundred forty".

Divisors: 1 2 3 4 5 6 8 9 10 12 15 18 20 24 30 36 40 45 60 72 90 120 180 360 27777769 55555538 83333307 111111076 138888845 166666614 222222152 249999921 277777690 333333228 416666535 499999842 555555380 666666456 833333070 999999684 1111110760 1249999605 1666666140 1999999368 2499999210 3333332280 4999998420 9999996840