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13238854780 = 2252099315361
BaseRepresentation
bin11000101010001100…
…01110010001111100
31021011122020111121211
430111012032101330
5204103121323110
610025402334204
7646033260154
oct142506162174
937148214554
1013238854780
115683a965a8
1226957ba364
13132ca114a8
148d8383764
155273d398a
hex31518e47c

13238854780 has 24 divisors (see below), whose sum is σ = 27814928400. Its totient is φ = 5293002240.

The previous prime is 13238854633. The next prime is 13238854787. The reversal of 13238854780 is 8745883231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13238854787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115701 + ... + 199660.

It is an arithmetic number, because the mean of its divisors is an integer number (1158955350).

Almost surely, 213238854780 is an apocalyptic number.

13238854780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13238854780 is an abundant number, since it is smaller than the sum of its proper divisors (14576073620).

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

13238854780 is a wasteful number, since it uses less digits than its factorization.

13238854780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317469 (or 317467 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 49.

The spelling of 13238854780 in words is "thirteen billion, two hundred thirty-eight million, eight hundred fifty-four thousand, seven hundred eighty".

Divisors: 1 2 4 5 10 20 2099 4198 8396 10495 20990 41980 315361 630722 1261444 1576805 3153610 6307220 661942739 1323885478 2647770956 3309713695 6619427390 13238854780