Base | Representation |
---|---|
bin | 110100000001… |
… | …110101000001 |
3 | 221122221011022 |
4 | 310001311001 |
5 | 11442421402 |
6 | 1204155225 |
7 | 223633532 |
oct | 64016501 |
9 | 27587138 |
10 | 13638977 |
11 | 7776190 |
12 | 4698b15 |
13 | 2a97001 |
14 | 1b50689 |
15 | 12e62a2 |
hex | d01d41 |
13638977 has 32 divisors (see below), whose sum is σ = 16809984. Its totient is φ = 10929600.
The previous prime is 13638943. The next prime is 13638991. The reversal of 13638977 is 77983631.
It is not a de Polignac number, because 13638977 - 220 = 12590401 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (13638907) by changing a digit.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 290168 + ... + 290214.
It is an arithmetic number, because the mean of its divisors is an integer number (525312).
Almost surely, 213638977 is an apocalyptic number.
It is an amenable number.
13638977 is a deficient number, since it is larger than the sum of its proper divisors (3171007).
13638977 is a wasteful number, since it uses less digits than its factorization.
With its predecessor (13638976) it forms an eRAP, since the sums of their prime factors are consecutive (148 and 149).
13638977 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 149.
The product of its digits is 190512, while the sum is 44.
The square root of 13638977 is about 3693.0985635371. The cubic root of 13638977 is about 238.9244522340.
The spelling of 13638977 in words is "thirteen million, six hundred thirty-eight thousand, nine hundred seventy-seven".
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