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13030540 = 2253121017
BaseRepresentation
bin110001101101…
…010010001100
3220112000112121
4301231102030
511313434130
61143142324
7215520625
oct61552214
926460477
1013030540
1173a0046
1244449a4
1329130a3
141a32a4c
151225d7a
hexc6d48c

13030540 has 24 divisors (see below), whose sum is σ = 28248192. Its totient is φ = 5043840.

The previous prime is 13030513. The next prime is 13030543. The reversal of 13030540 is 4503031.

It is not an unprimeable number, because it can be changed into a prime (13030543) 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, 9889 + ... + 11128.

It is an arithmetic number, because the mean of its divisors is an integer number (1177008).

Almost surely, 213030540 is an apocalyptic number.

13030540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13030540 is an abundant number, since it is smaller than the sum of its proper divisors (15217652).

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

13030540 is a wasteful number, since it uses less digits than its factorization.

13030540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21057 (or 21055 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 13030540 is about 3609.7839270516. The cubic root of 13030540 is about 235.3174523671.

Adding to 13030540 its reverse (4503031), we get a palindrome (17533571).

The spelling of 13030540 in words is "thirteen million, thirty thousand, five hundred forty".

Divisors: 1 2 4 5 10 20 31 62 124 155 310 620 21017 42034 84068 105085 210170 420340 651527 1303054 2606108 3257635 6515270 13030540