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13800655 = 511222811
BaseRepresentation
bin110100101001…
…010011001111
3221222010221101
4310221103033
512013110110
61211443531
7225206101
oct64512317
927863841
1013800655
117876700
1247565a7
132b2278b
141b93571
15132913a
hexd294cf

13800655 has 12 divisors (see below), whose sum is σ = 18203976. Its totient is φ = 10036400.

The previous prime is 13800653. The next prime is 13800671. The reversal of 13800655 is 55600831.

It is not a de Polignac number, because 13800655 - 21 = 13800653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13800653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10801 + ... + 12010.

It is an arithmetic number, because the mean of its divisors is an integer number (1516998).

Almost surely, 213800655 is an apocalyptic number.

13800655 is a deficient number, since it is larger than the sum of its proper divisors (4403321).

13800655 is a wasteful number, since it uses less digits than its factorization.

13800655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22838 (or 22827 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 13800655 is about 3714.9232831917. The cubic root of 13800655 is about 239.8648255007.

The spelling of 13800655 in words is "thirteen million, eight hundred thousand, six hundred fifty-five".

Divisors: 1 5 11 55 121 605 22811 114055 250921 1254605 2760131 13800655