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13087856880 = 243457247877
BaseRepresentation
bin11000011000001100…
…01101100011110000
31020210010010000110000
430030012031203300
5203300442410010
610002410110000
7642220643100
oct141406154360
936703100400
1013087856880
11560683264a
12265311b300
131307653317
148c22b9200
155190087c0
hex30c18d8f0

13087856880 has 600 divisors, whose sum is σ = 54064093248. Its totient is φ = 2924522496.

The previous prime is 13087856879. The next prime is 13087856893. The reversal of 13087856880 is 8865878031.

It is a happy number.

13087856880 is a `hidden beast` number, since 1 + 3 + 0 + 8 + 78 + 568 + 8 + 0 = 666.

It is a super-2 number, since 2×130878568802 (a number of 21 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 14923002 + ... + 14923878.

Almost surely, 213087856880 is an apocalyptic number.

13087856880 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 13087856880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27032046624).

13087856880 is an abundant number, since it is smaller than the sum of its proper divisors (40976236368).

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

13087856880 is a wasteful number, since it uses less digits than its factorization.

13087856880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963 (or 941 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 54.

The spelling of 13087856880 in words is "thirteen billion, eighty-seven million, eight hundred fifty-six thousand, eight hundred eighty".