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12638514 = 2371731571
BaseRepresentation
bin110000001101…
…100100110010
3212210002210010
4300031210302
511213413024
61130515350
7212265660
oct60154462
925702703
1012638514
117152559
124295b56
132806815
14196dc30
151199b29
hexc0d932

12638514 has 64 divisors (see below), whose sum is σ = 31629312. Its totient is φ = 3283200.

The previous prime is 12638503. The next prime is 12638533. The reversal of 12638514 is 41583621.

12638514 = T227 + T228 + ... + T443.

It is a super-2 number, since 2×126385142 = 319464072256392, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21849 + ... + 22419.

It is an arithmetic number, because the mean of its divisors is an integer number (494208).

Almost surely, 212638514 is an apocalyptic number.

12638514 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12638514, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15814656).

12638514 is an abundant number, since it is smaller than the sum of its proper divisors (18990798).

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

12638514 is a wasteful number, since it uses less digits than its factorization.

12638514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631.

The product of its digits is 5760, while the sum is 30.

The square root of 12638514 is about 3555.0687757060. The cubic root of 12638514 is about 232.9335280428.

The spelling of 12638514 in words is "twelve million, six hundred thirty-eight thousand, five hundred fourteen".

Divisors: 1 2 3 6 7 14 17 21 31 34 42 51 62 93 102 119 186 217 238 357 434 527 571 651 714 1054 1142 1302 1581 1713 3162 3426 3689 3997 7378 7994 9707 11067 11991 17701 19414 22134 23982 29121 35402 53103 58242 67949 106206 123907 135898 203847 247814 300917 371721 407694 601834 743442 902751 1805502 2106419 4212838 6319257 12638514