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12908998080 = 2633511373671
BaseRepresentation
bin11000000010110111…
…11010110111000000
31020022122120001022000
430001123322313000
5202414200414310
65532540344000
7634616446626
oct140133726700
936278501260
1012908998080
11552487a360
122603245000
1312a958ba04
148a663b516
155084784c0
hex3016fadc0

12908998080 has 448 divisors, whose sum is σ = 51036687360. Its totient is φ = 3044044800.

The previous prime is 12908998061. The next prime is 12908998087. The reversal of 12908998080 is 8089980921.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12908998087) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3514645 + ... + 3518315.

Almost surely, 212908998080 is an apocalyptic number.

12908998080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12908998080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25518343680).

12908998080 is an abundant number, since it is smaller than the sum of its proper divisors (38127689280).

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

12908998080 is a wasteful number, since it uses less digits than its factorization.

12908998080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3745 (or 3729 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 54.

The spelling of 12908998080 in words is "twelve billion, nine hundred eight million, nine hundred ninety-eight thousand, eighty".