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13280880 = 243555337
BaseRepresentation
bin110010101010…
…011001110000
3220222201221110
4302222121300
511344442010
61152353320
7220612524
oct62523160
926881843
1013280880
117551138
124545840
1329a0012
141a99d84
151275120
hexcaa670

13280880 has 40 divisors (see below), whose sum is σ = 41171472. Its totient is φ = 3541504.

The previous prime is 13280873. The next prime is 13280881. The reversal of 13280880 is 8808231.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13280881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27429 + ... + 27908.

Almost surely, 213280880 is an apocalyptic number.

13280880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13280880 is an abundant number, since it is smaller than the sum of its proper divisors (27890592).

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

13280880 is a wasteful number, since it uses less digits than its factorization.

13280880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55353 (or 55347 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 13280880 is about 3644.2941703436. The cubic root of 13280880 is about 236.8148601278.

The spelling of 13280880 in words is "thirteen million, two hundred eighty thousand, eight hundred eighty".

Divisors: 1 2 3 4 5 6 8 10 12 15 16 20 24 30 40 48 60 80 120 240 55337 110674 166011 221348 276685 332022 442696 553370 664044 830055 885392 1106740 1328088 1660110 2213480 2656176 3320220 4426960 6640440 13280880