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12986910720 = 211325741491
BaseRepresentation
bin11000001100001010…
…01000100000000000
31020112002011102100100
430012011020200000
5203044122120340
65544402322400
7636553630320
oct140605104000
936462142310
1012986910720
115564855273
122625359400
1312bc76ac74
148b2b1d280
15510218830
hex306148800

12986910720 has 576 divisors, whose sum is σ = 52802305920. Its totient is φ = 2890137600.

The previous prime is 12986910707. The next prime is 12986910743. The reversal of 12986910720 is 2701968921.

It is a tau number, because it is divible by the number of its divisors (576).

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

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, 26449675 + ... + 26450165.

It is an arithmetic number, because the mean of its divisors is an integer number (91670670).

Almost surely, 212986910720 is an apocalyptic number.

12986910720 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 12986910720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26401152960).

12986910720 is an abundant number, since it is smaller than the sum of its proper divisors (39815395200).

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

12986910720 is a wasteful number, since it uses less digits than its factorization.

12986910720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572 (or 549 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The spelling of 12986910720 in words is "twelve billion, nine hundred eighty-six million, nine hundred ten thousand, seven hundred twenty".