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13129930 = 2511119363
BaseRepresentation
bin110010000101…
…100011001010
3220201001212201
4302011203022
511330124210
61145230414
7216413452
oct62054312
926631781
1013129930
117458790
12449240a
1329493b8
141a5ad62
15124553a
hexc858ca

13129930 has 16 divisors (see below), whose sum is σ = 25782624. Its totient is φ = 4774480.

The previous prime is 13129927. The next prime is 13129937. The reversal of 13129930 is 3992131.

It is not an unprimeable number, because it can be changed into a prime (13129937) 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, 59572 + ... + 59791.

It is an arithmetic number, because the mean of its divisors is an integer number (1611414).

Almost surely, 213129930 is an apocalyptic number.

13129930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13129930 is a deficient number, since it is larger than the sum of its proper divisors (12652694).

13129930 is a wasteful number, since it uses less digits than its factorization.

13129930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119381.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 13129930 is about 3623.5245273076. The cubic root of 13129930 is about 235.9142295807.

The spelling of 13129930 in words is "thirteen million, one hundred twenty-nine thousand, nine hundred thirty".

Divisors: 1 2 5 10 11 22 55 110 119363 238726 596815 1193630 1312993 2625986 6564965 13129930